Please what are the easiest and fastest steps in order to find backup of a currently unavailable post thanks to no longer running Lemmy instance?

Lets say it is this post we are reading, that become offline. I am not asking for the links to instances that hosts it, but for the way on how to discover all the instances myself.

So far I have found only this way:

1. open largest instances list: https://lemmyverse.net/?order=posts&open=true

2. open one after another and under magnifier button, search for the same post ID (number) as your dead link has. One can also search for the post title (while making sure that the search scope is everywhere, not local).