For instance, this one (link to a post to !memes@reddthat.com): https://reddthat.com/post/20260613
Pasting it in your search bar should give you this kind of results:
You can then click on it to access the post from your instance (in this example, lemmy.zip: https://lemmy.zip/post/16918691)
To be fair, Lemmy is super alpha software. It’ll take months and years before the platform is mature and more user friendly and has an ecosystem of really good apps.
We’re like, emails just got invented era of fediverse. It’s having to explain that yes, if you have a Yahoo address you can still email Hotmail users 2 decades ago all over again.
Now that the big ones like Threads and Bluesky are joining, users will be more familiar with the concepts and it’ll get less… confusing.