Does restic support FUSE3?

@PatthewMerry why would your fusermount not be in your $PATH?
@PatthewMerry @Smedley_Butler what is the exact command and error you get?
I did a quick trial on Ubuntu server 24.04.4 LTS with restic 0.18.1 and it works normally.

ResticBackup$ which fusermount
/usr/bin/fusermount
ResticBackup$ fusermount --version
fusermount3 version: 3.14.0
ResticBackup$ ls -l /usr/bin/fusermount
lrwxrwxrwx 1 root root 11 apr  8  2024 /usr/bin/fusermount -> fusermount3*
ResticBackup$ restic -r ST/test.transfer.repo/ mount /tmp/resticmount/
enter password for repository:
repository 0ee0a9d7 opened (version 2, compression level auto)
[0:00] 100.00%  1 / 1 index files loaded
Now serving the repository at /tmp/resticmount/
Use another terminal or tool to browse the contents of this folder.
When finished, quit with Ctrl-c here or umount the mountpoint
ResticBackup$ mount|grep resticmount
restic on /tmp/resticmount type fuse (ro,nosuid,nodev,relatime,user_id=1000,group_id=1000)
/tmp/resticmount$ ls -l
total 0
dr-xr-xr-x 1 ubuntu ubuntu 0 mei 29 12:35 hosts/
dr-xr-xr-x 1 ubuntu ubuntu 0 mei 29 12:35 ids/
dr-xr-xr-x 1 ubuntu ubuntu 0 mei 29 12:35 snapshots/
dr-xr-xr-x 1 ubuntu ubuntu 0 mei 29 12:35 tags/