Twitter, Derek's SGC's discord (https://discord.gg/7fFFzNsPEF), and Alan's Matrix server are the three main places to find imagery. That and people's own personal web sites. Here's mine.
https://geostation.io/
Please don't criticize my site too much, I've not updated it for ages and historically I used it as a place to dump output from my geostationary satellite stations.
And I guess the other thing to mention is that x band data often adds up real quick, so it's nowhere near as prevalent in full resolution online. I'm basically surrounded by forest and only get sync on Chinese LEO sats at maybe 35°+ north and then lose sync due to the forest at ~30° elevation south. My resulting true color composites are routinely 400-500MB.
Someone with clear LoS to either horizon can easily produce composites that are over 1GB per image.