makecode arcade gives you the embed code on the share project popup thingy. you'll need to turn it into an html file.
you can also remove the simulator buttons and border, if you are interested in doing that feel free to ask!
Ahh, thank you so much! And yeah, I would love to remove the simulator stuff!
https://forum.makecode.com/t/getting-rid-of-the-simulator-for-itch-io/16756/7