@Percy It's not ideal, but you can also manually form the URL to load the instance if it's not yet turning up in a search.
Basically the format is like this
mylemmy.domain/c/[email protected]
So to view [email protected] from my home lemmy instance of blahaj.zone, I would type the following
https://lemmy.blahaj.zone/c/[email protected]
And to view it from lemmy.one, you would type the following (though I can't test this one)
https://lemmy.one/c/[email protected]