no, sorry. Only export formats that are native parts of Zotero can be exported from the webpage.

On a more meta level and apart from the technical issues involved, I believe Dan--Zotero's lead developer--disagrees with some of the design decisions Frank and I made for ODF Scan and so, when Zotero implements it's own improved document scan, it'll likely look a bit differently. Because of that, it makes sense that they'd make very clear that Scannable Cites aren't a Zotero feature.

All that said, the scannable cites can be constructed easily from information available via API, so if you're looking in that direction we could give you some pointers on how to make that happen.

Thanks guys, I ended up using Alfred and ZotQuery for Scanable Cites, but that only gets me a solution on my desktop.

If you have suggestions about how I can jump in and write some code to get Scannable Cites out of the website, I'm game.

not in the same way, no (all the scanners use RTF as an output format for the actual citations. Zotero's citation engine doesn't produce MMD). But why not just use pandocs citation feature. Integrates nicely with Zotero, even nicer if you use zotxt.

Getting the Scannable Cite from the API is trivial - it's just the item's ID wrapped in some curly brackets, pipes, and with zu: in front of it. The question is what you want to do with it and how you want to retrieve it. That's the more difficult part to write.
I believe ZotQuery, for example, already generates scannable cites via the web API.