@AnarchoNinaWrites
Yeah, it's something of a delicate operation to ask your admin for that. I nagged the Kolektiva admins about it a couple times, and they're about to turn it on.
On the problem you described, I empathize, I've run into that myself. But it would only really work for you if it's activated on your instance.
If it's any help at all, here's a link to a good write up on the subject, with admin-level information: https://hub.sunny.garden/2023/06/28/what-does-authorized_fetch-actually-do/