Hi AdmiralRaccoon,
not sure how invested you are in HomeAssistant but have a look at Homeseer, a great and highly customizable plugin has been developped for Winamp:
https://homeseer.com/https://forums.homeseer.com/forum/3rd-party-developer-area/general-developer-discussion/jon00/94458-jon00-winamp-wacup-controller-for-homeseer-3-and-homeseer-4 (Developer Jon00)
You can customize and manage most WACUP controls via Homeseer dashboard/Android clients.
Jon00 and DrO have been very kind/helpful to facilitate the Homeseer/WACUP integration;
there are still some challenges to make the integration seemless (Library management, JTFE access, etc) but DrO has API/Webserver improvements on the roadmap.
Until a new API is out, I highly doubt we will see another dedicated Android Winamp/WACUP app on the playstore.
Meanwhile, you can also use the Android app "Ampwifi" to complement (The developer is still active/responsive - I use Ampwifi to navigate folders and enqueue via JTFE);
I've used/tested all Android/Winamp interfaces, including AWARemote Pro, PlayaControl, Remote control for winamp, etc. but the most stable/usable/still active is Ampwifi at the moment.
Hope this helps, feel free to reach out if needed.
Cheers,