Relational Operators Doesn't take effect

[Mutska]

All works fine except these operators including "==".

Am I missing something?

[ehamberg]

Don't think you're missing something. That should “just work”.

If you open vim with no file, insert “!=”, move the cursor to another line and then run the following commands, does that work?

:syntax match operator "!=" conceal cchar=≢
:setlocal conceallevel=1

[Mutska]

Yeah, that works, thanks. I put this in my init.vim

And voilà

Although I don't know why it doesn't work with the actual file only