Thanks for reaching out and for your interest in CryptPad!
I'm not a WebDAV expert but as far as I know it doesn't supports end-to-end encryption at all. How would you like us to implement it considering this?
For information CryptPad encrypt everything right from your web browser, the server hosting your files can't access them. Hence, I'm not sure we can implement WebDAV without handling end-to-end encryption.
Let us know what you think! 🙂