CoMaps release 2025.12.19 is now out.
In addition to fresh #OpenStreetMap data from December 17, new features on Android include better warnings about outdated maps when trying to edit OSM and the ability to specify your own remote-server for downloading maps.
(Note: For now CoMaps expects the custom server to still serve the same maps as the "official" CoMaps server, but it's a start.)
https://codeberg.org/comaps/comaps/releases/tag/v2025.12.19-11
I presume this would be useful for using mirrors