Workaround for importing Figma Make project to Figma Design?

I got quite far into developing a project in Figma Make before I found out that you cannot go from Figma Make to Figma Design. (Brutal. When I opened Figma Make I didn’t even realize it was a coding tool. Naturally, I assumed it was for prototyping.) I tried a workaround based on exporting the Make project and using an HTML-to-Figma plugin, but the Make project doesn’t appear to have HTML files built in.

Has anyone discovered any good workarounds for this?