Open OruxMaps, go to Switch Map > Online , and tap the Refresh button (circular arrows) to load the new sources. Structure of a Map Source Entry
Many communities provide updated XML files. High-quality collections can be found on AnyGIS or in dedicated Telegram groups.
Users are encouraged to place their own version in /oruxmaps/mapfiles/customonlinemaps/onlinemapsources.xml . Files in this folder are protected from updates. How to Add Custom Map Sources
Copy the downloaded onlinemapsources.xml into the /oruxmaps/mapfiles/customonlinemaps/ directory on your device.