DAVx⁵ (WebDAV) has been successfully tested with infomanik KDrive.
infomaniak.com is a hosting platform that also provides cloud services (including WebDAV access).
You can access your KDrive files using the DAVx⁵ WebDAV mounts feature.
WebDAV URL: https://connect.drive.infomaniak.com
User name and password: your account email address and password (2FA: app-specific password)
You need to generate an app-password to access WebDAV when having 2FA in use.