I'd appreciate someone with more knowledge about certificates checking if this is a good idea and if I did it correctly. It definitely fixes the issue.
https://codeberg.org/tusky/Tusky/pulls/5427
#tuskydev
trust sectigo root certificates to make some servers work on older Android versions

These certificates are from 2021 and not trusted on Android versions that are older. We already do the same with two ISRG/Let's Encrypt certificates for the same reason. Closes https://codeberg.org/tusky/Tusky/issues/5423

Codeberg.org

@ConnyDuck

These are the certs in newer Android trust chains? Looks like a sound change to me, but it does mean Tusky will be a loose end if other sources stop trusting either of these