Add to /wiki/doc/NextGenOnions OnionShare's v3 onion service
It's written at the very bottom of the website https://onionshare.org/
http://lldan5gahapx5k7iafb3s4ikijc4ni7gx5iywdflkba5y2ezyg6sjgyd.onion/
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information