My app Linkahest will do that for you for Reddit, YouTube and X but I'm considering to make it universal.
Chime in if you'd be interested in that: https://github.com/circumspace/linkahest/issues/4
Discussion
I'll have to try it out! I check URLs automatically anyways but for most users I assume they could use something like this so that they can just share content without needing to really think about is (since that's what most people do by default).