Looks like Lemmy has decided to use a flavor of Markdown which is inconsistent from Mbin’s. That’s a shame.
Weirdly enough, different Lemmy Android clients for Lemmy also work differently with the scripts formatting, each having their own quirks. One person though did fix their problem by upgrading their client app to the latest version.
I had thought it was all one single standard, when first started using the formatting. My original intent was just to have a smaller font, as I was at first just using the link format without any subscripting, but people were complaining about that, so I was trying to compromise and make it smaller.