I have been a happy long-time user of andOTP since migrating to it from FreeOTP (iirc) and was unaware that it was no longer maintained. Some quick digging shows that the Github repo links to this XDA post[0] where the author announced he was ceasing development. :(
The good news is that migrating to Aegis is quite simple. Export from andOTP, in Aegis go to Settings -> Import & Export -> Import from File, & choose andOTP. Pick your file and away you go.
It doesn't seem to have a database of icons like andOTP does though; none of my imported items show an icon though several did in andOTP. (Could this be because of the method they were added?)
[0] https://xdaforums.com/t/unmaintained-app-4-4-open-source-and...