Is data transfer from Android phone to Garmin watch via ConnectIQ still supported?

Is data transfer from an Android "companion app" to Garmin devices with ConnectIQ still supported? Half a year ago I wrote an app where gpx files are transferred from a companion app to a garmin watch. At the time I started out from an original garmin github example. It worked like a charm and I never had transfer issues. Now, a couple of Android- and watch updates later, the transfer no longer works. I tried to troubleshoot, updated SDK versions, downgraded SDK versions, asked Claude Code for help etc.. But nothing helped. Error logs show no real error messages. The devices see each other, but ultimately no data is transferred. As a last resort, I wanted to try the Garmin example again, but could not find it (looks like there is only the IOS version left; connectiq-companion-app-example-ios). My question: Is it a general issue that data transfer from Android no longer works, or am I the only one having this trouble? (I am not pasting versions information here, because I tried so many. I am merely interested in statements like: "Yeah, I had the same experience and gave up in the end." or "No, data transfer from Android works for me as always.")

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