To see what I mean, go to any instance, visit the explore page, and click a hash tag. Then go to a different instance and enter that same tag on the second instance. In every example I’ve tried, the second instance either has a completely different set of photos for the same tag or no photos at all. For example, on https://gram.social/ the tag #carspotting shows 171 posts. Now if I try the same tag on https://pixey.org, 0 posts.