Here’s a workaround (as mentioned above).
This is my game project page with an embedded game published on itch.io.
EDIT:
The only problem is when itch.io goes down which it has for some reason
EDIT 2:
Looks like it’s not itch.io’s problem
I contacted my hosting support team who showed me the errors they were seeing on their end for my locally served game scene. I can see some errors in Firefox but not Safari (screenshots below)
My game scene plays without issue on itch.io and I can embed the itch.io game in a web page without problems.
My web hosts suggested I reach out to platforms like Stack Overflow. Any tips for Stack?
On your web host in the directory that you’re putting your web export files create a new file named “.htaccess”
it’s contents should be:
Header set Cross-Origin-Embedder-Policy “require-corp”
Header set Cross-Origin-Opener-Policy “same-origin”