I've been using Hondalink on the Android 10 betas with no problems for the last few months. Since I updated to the release Android 10 on 9/3, I'm still able to log in to the app with no problem, but the last time it showed an updated status was yesterday (Fri, 9/6@12:30 PM EDT), and the status it reported was actually obsolete.
I'm not getting any more reported updates from it. The scheduled charging activity worked properly last night, but Hondalink didn't show that activity while it was charging, and said that it had failed. If I try to find the car on the app, it just times out, or reports that it is unreachable, and that the car may be in a low signal area, while parked in locations that have worked previously.
There haven't been any app updates since June, so it doesn't seem to be a new bug in the app. I really doubt that the Android 10 update is the source of the problem. I suspect, and I'm hoping (praying?) that Honda has a problem on the server end, and that they can fix it soon.