Please disconnect your Enpass vault from WebDAV on all devices and then reconnect it. Once all devices are synced, create a test entry on one device, wait for the sync to complete, and verify that the test entry appears on the other devices.
If the issue persists, open your Enpass app, go to Settings → Vaults → Sync, and check for any sync errors on any device. If you see an error, please email a screenshot along with this forum link to support@enpass.io.