I don't know of any, but if you search up like "gb web emulator" or "gameboy javascript emulator" or something like that, you can find a web emulator to link to. I found one a little bit back that you can embed???? but I don't remember where it is at all

I did a brief search, but I didn't find anything promising. Sadly, I'm too preoccupied with trying to finish my game to do a proper search. If anyone finds anything, please do share.

GB Studio is using BinjGB for web export. I've seen it done with assembly games before. *There are other web emulators, but I can't remember the names right now. I guess you know how to set it all up, if not you might get lucky with taking a GB Studio web release zip and just change the ROM file in there. :)