There is no universal cross-play between different consoles in different families (e.g., between Xbox and PlayStation), nor is there cross-play between console platforms and the PC (Steam) version of Unturned.
Cross-generation play is available between consoles in the same family. In other words, consoles from the same manufacturer but different generations.
- Xbox One players can play with Xbox Series X|S players.
- PlayStation 4 players can play with PlayStation 5 players.