Are you still actively working on/developing on the project?
Skipping new developments can be fine. Moving slow or not at all can mean stability and predictability.
The biggest issue is missed security updates, if they exist, or a lack of identification and fixing of open security issues.
And, of course, developer convenience if the project is still being actively worked on.
How viable is shifting from app to the web platform? Installable PWAs or PWA without installs.
Seems like it could be an alternative for most(?) things.