Been working quite reliably for me. Just gotta make sure it’s battery usage is set to “Unrestricted” in the power settings for the app, and also disable every smart battery management options in the phone’s settings.

As manufacturers try harder and harder to make the battery last longer/offset the drain caused by all the bloatware they ship with it, lots of phones will aggressively stop any apps running in the background that you haven’t interacted with in a while.

Right now my phone says KDE Connect has been active for 104 hours, which is about how long it’s been since the last reboot. I’ve seen it go in the 200s.