Orbi RBR 850 connected to Starlink - unable to login to and access Orbi router settings.

When a device is connected to the Orbi, either with ethernet or WiFi, the Orbi router will appear as the "gateway" IP address.

This IP is affected by what ISP device the Orbi is connected to.

Is this a link to the Starlink that you have?

https://www.starlink.com/ 

If so, it appears that Starlink provides a WiFi router as part of the "Kit".  The Starlink router will assign a private IP address to the Orbi router.

https://en.wikipedia.org/wiki/Private_network 

The Orbi will then create a Local Area Network (LAN) with a different private IP space.  So, 192.168.1.1 may or may not be the IP address of the Orbi router.

The way to determine the Orbi IP address is to look at the address information provided to a device on the Orbi LAN (connected either with ethernet cable or WiFi.)  Each device will have:

• Assigned IP address
• Subnet Mask (which is always 255.255.255.0)
• Gateway IP address
• DNS IP address

The Gateway and DNS IP addresses are for the Orbi router.

Having two 'routers' is common, because most customers simply plug in their home WiFi system to the ISP system.  In technical terms, this is known as a "Double NAT" (do an internet search on Double NAT).  This can interfere with specific networking uses, including OpenVPN, forwarding ports, and certain internet gaming.  If your usage happens to be affected by having two routers, there are several methods to deal with the problem.  If you experience no issues, then eliminating the Double NAT is a choice.