I have the latest versions of both desktop Steam on Mac (Big Sur 11.6) and the SteamLink app on iOS (15.6.1 on an iPhone 13). Both devices are on the same WiFi network. I have enabled Remote Play on the desktop (macbook) app, but the SteamLink app on iOS does not find the Mac. I've tried both scanning and entering the PIN from the 'Other Computer' option, and neither work.

Based on troubleshooting posts, I have both quit and restarted Steam, checking 'Remote Play' on and off each time, and rebooted the whole Mac.

(Further difficulty: I am hoping to run a non-Steam desktop game on my phone, so there will be a bunch of mapping after that - but I can't even PAIR.)

It's hard to find information on the situation where the Mac is the HOST, not the client - so many online posts are referencing Steam Link on a Mac remoting into a PC, which is not what I am trying to do.