So, if you didn’t know already macFUSE has released FSKit backend which can work without enabling kernel extensions on macOS: FUSE Backends · macfuse/macfuse Wiki · GitHub
This allows rclone to mount remotes without relying on fuse-t or nfsmount which might work better thanks to better system integration. You’re able to mount a rclone remote with it right now with this command:
sudo mkdir /Volumes/Drive
rclone mount -v -o backend=fskit -o volname=Drive --vfs-cache-mode writes drive: /Volumes/Drive
But for now it is unusable, and while simple listing works but writing or reading doesn't seem to be working.