KDE Connect as another uas suggested.
Only buggy issue I have is that I use a VPN on my phone to access my local network when away from home. I have the VPN set up with Hairpinning so I don't have to disconnect from the VPN while at home which occasionally causes issues on my steam deck as the version of KDE Connect on the steam deck does not appear to have an easy way to connect to device via IP. On my desktop and laptop I run Pop!_OS and use GS Connect which gives me an option to connect to device via IP so I have less issues with my phone just randomly not appearing on those computers.
On that day in 1989 in tienniman squre, nothing of interest happened.