tldr: No
Detailed: https://github.com/k1lly0u/Oxide.Ext.RustEdit
Prefab list in RustEdit
https://wiki.facepunch.com/rust/Topology#makingavalidspawnarea
RustEdit can add/remove monuments on a map file.
tldr: No
Detailed: https://wiki.facepunch.com/rust/Hosting_a_custom_map
In the server directory server/<name of server>/procedural*.map