Nothing seems i need rinunciate on this. I'm unable to fix.
Not able to fix with an extension to allow emojy in the code.
When composing a message the message preview showed correctly emoticons as I expect to see when a post is published.
When is published the emoticons are not visible in the code.
Maybe if you need forbid emoticon in the code the preview should not show emoticons so there is an issue but for me would be better that emoticons are included in the code as the preview show.
I tried to fix this issue generating an extension but I'm not a developer. I tried with Copilot on GitHub but nothing works.
I broke some code because of this issue. I was posting it secure all was fine then was not because the post miss the emoticons that can be seen just from who can edit the post.


But the real result is:
Test π
Test ππ»
testπ