@pandaemoniumminiatures
Maybe, check this from @PleaseCaption

"🔔 To get started:

1. Follow me and I'll start to follow you back
2. Every time you forget to add a text description to an image I will send you a reminder.

Don't want reminders anymore Unfollow me!"

@Archiviste_Dragontigre Thank you, that could be handy. I've also answered my own qu that images from crossposted tweets don't preserve the alt text - boo :(
Cool, thanks for your help :)