pydrimeのserverモードはWebDAVだけでなく3種類から選べた
Commands:
  restic  Start a restic REST server backed by Drime Cloud.
  s3      Start an S3-compatible server backed by Drime Cloud.
  webdav  Start a WebDAV server backed by Drime Cloud.
しかしpackageが足りない?
$ pydrime server webdav
Error: pywebdavserver is not installed.
Install with: pip install pydrime[server]
Or: pip install pywebdavserver[drime]
入れて
$ pipx inject --force pydrime 'pydrime[server]'
  injected package pydrime into venv pydrime
done! ✨ 🌟 ✨
動いた
$ pydrime server webdav

Starting WebDAV Server
  Backend: Drime Cloud
  Workspace ID: 0
  Address: 0.0.0.0:8080
  Mode: Read-write
  Auth: Disabled (anonymous access)

Mount WebDAV share:
  URL: http://localhost:8080/

Platform-specific instructions:
  Windows:  Map network drive in File Explorer
  macOS:    Finder → Go → Connect to Server
  Linux:    nautilus http://localhost:8080/

Press Ctrl+C to stop the server