The latest update for 'Zero Caliber: Reloaded' introduces mod support, PvP cross-play, and various other enhancements. - Oculus Blog
New ‘Zero Caliber: Reloaded’ Update Adds Mod Support, PvP Cross-Play, and More
A major update for Zero Caliber: Reloaded is now available, offering modding support for users to create and share their own multiplayer and co-op maps, as well as introducing PvP mode. For complete details, please visit the source at Oculus Blog.
Source: https://www.meta.com/blog/quest/zero-caliber-reloaded-modding-cross-play/