Reading your title I thought you just need the relink plugin! Relink — flexibility when relinking renamed tiddlers
But I’ve retitled your post, because you seem to be talking about permalinks.
Perhaps this is helpful: Permaviews plugin - Open predefined tiddlers with a customizable permalink
or this: How to customize permalinks?
Remember that permalinks can use any filter language, with a colon after the hashtag, like this: https://tiddlywiki.com/prerelease/#:[tag[About]] (not sure why this forum refuses to include the second closing bracket in the url — copy the whole url to clipboard, including second bracket).
So, if you can nail down anything that you know you’re not going to change in a tiddler (a certain field value, etc.) then you can build a permalink out of that.