I have 40-50 devices connected to my Orbi and run into issues with my Ring doorbells and cameras reporting bad r weak connection issues. Router is about 12 feet from the devices. It's in a security room below the stairs. So it goes thru one interior wall and one exterior. Is the amount of devices make the connection weak?
Orbi can support up to 250 devices:
Might also want to check out this thread, which talks about Ring doorbell performance.