Ah, I see this now. Me and my boyfriend tried switching to Nextcloud a few years ago, but this wasn't implemented on iOS yet so we had to look elsewhere. Nice to see this opened up, it's about time. Hopefully they'll reverse their sideloading opinions as well.
It really got a lot better over the past years indeed. I do miss support for Heic, recently NC just decided to upload Jpeg instead of Heic, and I have mixed feeling about that (Jpeg just works, the new pictures app is great because of it... But I would prefer to have heic and live images everywhere...).
