Orbi with Sky Q

To fully help, we need to start at the beginning.  

What firmware is loaded in your Orbi's?

What is the mode your Orbis are operating on?  AP or Router?

What is the specific make/model of equipment your Orbi is plugged into?

Modem Combo Units:
Couple of options,
1. Configure the modem for transparent bridge mode. Then use the Orbi router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly.
2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ or IP Pass-Through for the IP address the Orbi router gets from the modem. Then you can use the Orbi router in Router mode.
3. Or disable all wifi radios on the modem leaving it in router mode and connect the Orbi router to the modem, configure AP mode on the Orbi router. https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-point and https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop

Hi Aronius - not sure if you managed to resolve your Sky Q issues, but there is another factor at play that could be impacting both your Sky Q TV streaming (which uses Sky's on mesh network in 5GHZ) and your Orbi's wifi performance.   Unfortunately both devices hog the 36-48 5GHZ channels as they use an 80MHZ channel width (so even if the Sky and Orbi are on different channels in the set up, this is just the center channel and they use the other 3 channels around it).    Doubled up with the fact that the 5GHZ channels 36-48 are already getting very congested in the UK , especially in urban areas like London, leads to lots of interferance (e.g. where I live I can pick up at least 10 other wifi networks in my house and a few of them are similar strength signals to my Orbi and Sky networks).    The only thing I've found that can help is to try the following:

1. If possible place you Orbi some distance away from your Sky TV main box (not easy I know if your broadband is from Virgin as likely the cable comes in near where your TV is).

2. Force the Sky Q system to use a narrow 40GHZ band using the 'engineers menu' options on your main Sky box.  To get to this scroll to the "Settings" menu and before selecting it type in 001 on the remote and then hit the select button.   You should see a message pop up at the top of the screen warning you are in the advanced menu.   Goto "Network" and you should see an option "5GHZ wifi channel width'.   You now have two options, and will need to experiment to work out which one is best for you as it will depend on other wifi networks in your area (if you have a wifi scanner like WiFI explorer of inSSIDer that should make things easier to work out which is best combition for you):

(a) Set the Sky Q to 40 MHZ/Ch.36 and set your Orbi to channel 48

OR

(b) Set the Sky Q to 40 MHZ/Ch 44 and set your Orbi to channel 36

If you do this on the main box it should cascade this setting around any other Sky Q TV boxes in the house, but you can double check by going into the same menu on the other boxes.  There is more on this issue at https://www.expertreviews.co.uk/tvs-entertainment/pvrs/1404726/how-to-fix-sky-q-connectivity-problems/page/0/3

I found this had no impact at all on my Sky Q performance as 40MHZ is more than enough bandwidth for streaming TV, even 4K HDR.

3. Final option only works if you don't use Sky broadband and have your main Sky Q box connected via ethernet to your network.  You can use the same menu options as per point 2 above and disable the 2.4GHZ wifi on your Sky Q mesh network as it's not needed and will reduce congestion on the 2.4GHZ band in your home.

Unfortunately the ideal solution would get either Sky or Netgear to make additional 5GHZ channels available.  I've been lobbying Netgear for over a year on this point (see https://community.netgear.com/t5/Idea-Exchange-For-Home/Please-provide-more-5GHZ-wifi-channel-options-restricting-to/idc-p/1752699#M2362) so please like this post if you would like to see this feature and add in some supporting comments as the more customers that ask for it should increase the chances of it being added.  You can do the same with Sky forumns.

There is also one more advanced thing you can do and seperate the 5GHZ and 2.4GHZ wifi networks on your Orbi, so you can make sure your high performance devices always make use of the 5GHZ channel.  Because of the interfereance from Sky Q I found that my iphone and other devices would keep on connecting to the 2.4GHZ channels even when there was a reasonable 5GHZ signal and the only way to force the iphones to use the right channel was to resort to this option.   I as have Virgin Vivid 350Mbs that was the only way I could get the full speed on wifi networks - I can only get 30-40Mbs on a strong 2.4GHZ connection so was losing c90% of the speed.   Doing this is not something Orbi offically recommend but it can be done, so only do this if you are happy to give it a go.  You always revert back if needed.   See this thread for full details on how to do this https://community.netgear.com/t5/Orbi/How-to-set-a-separate-SSID-for-the-5-GHz-network-on-your-Orbi/td-p/1396594

The other option of last resort is to use powerline adapters or ethernet cables for your Sky Q boxes and disable the Sky mesh network completely and use the advance menus in Sky discussed above to turn off both 2.4ghz and 5ghz wifi radios.   You will have to reset all the network settings on your Sky system if you go this route.

Hope this helps!