Verbose2812

if you see a community for the first time, it will take a while to load the last 20 posts on that community. after that, every time an update is done on the remote community, it will be pushed to yours.

idk if at least one person need to subscribe to it, or just opening it is sufficient.

that's pretty boring.

well at least we can enjoy their content without their limitations, since we see it from a different instance.

add multi community aggregation to aggregate communities of the same topic on different instances.

they defederated?

there is an app for mobile. that also offer continuous backup of photos (like gphoto)

if they have the same hash the deduplication thing will work. if they are different quality or other stuff no. thare are plans to implement something regarding more advanced deduplication but not anything implemented at the moment.

immich!

there is an entire instance dedicated to that, use the lammy explorer to find stuff. be aware that your instace could have defederated from that instance.