On Android, I am using Thunderbird connected via IMAP, and using CalDAV with DAVx5 to sync my calendar. On desktop, when I receive a calendar invite to Thunderbird, I am able to accept/decline. However, on Android, I have no option to Accept/Decline. I believe this is because on desktop, Thunderbird has a calendar client, while on Android it doesn’t. But this is crazy to me. I am struggling to find a way to accept invites on mobile.