Very detailed instructions on how to download photos from the Tea app leak:
1: Open browser on phone or computer
2: Open https://firebasestorage.googleapis.com/v0/b/tea-the-app.appspot.com/o/
3: Open this link https://firebasestorage.googleapis.com/v0/b/tea-the-app.appspot.com/o/attachments%2FYOURKEYHERE?alt=media but replace YOURKEYHERE with a key from the link in step 2
4: File will download. Save it as a jpg to view it.

Picrel is how to download all of the photos simultaneously, using a script: (So that you don’t have to save them one at a time)
1: Install PIP
2: Run script through PIP