RBK753 issue with ps5 and Sky q

I have a 1gb internet service from virgin media and have put the Virgin media router into modem mode and the Orbi RBK753 into router mode on the ground floor. I have 2 satellites not too far from the router - one on the ground floor and the other upstairs so fantastic speeds everywhere. Firmware is all up to date.

I have sky q where the main box is connected via Ethernet (2ghz field is switched off and using 40mhz channel 36)to the main orbi router and the sky mini boxes are connected via WiFi (with a sky booster in the middle between the main box and mini boxes) which works well. No connection issues whatsoever thankfully and fantastic speeds through the house.

Can use devices like tablets and phone while using one ps5/ sky mini boxes simultaneously however the problems starts when myself and brother start using our ps5s. Not only do the ps5s lag while playing online but sky q mini boxes stop working altogether. When one ps5 is in use, then all is well.

The ps5s are connected wireless to a satellite ( a satellite where it is not being hogged by other devices) using 5ghz and cannot be wired. The sky q mini boxes which I know they use 5ghz also cannot be wired.

Any helpful suggestions would be much appreciated as even with two ps5s in use, the whole network speed is greatly reduced. My previous ISP BT where I used only one router on a 40mb connection did not have this issue.

Thank you.