Writing in Scrivener -> publishing in Substack?

Greetings, my blog pieces are fairly long so writing in Substack, at least for me, isn’t ideal. However, I’m trying to figure out the best way to get content into Substack. For now, I’m just cutting and pasting sections and then formatting it the best I can. Is there a better way? Thanks!

Does your other software have an import function ?
If yes, look for importable formats that are also available in Scrivener’s compile panel.
That’s how I would do it.