How can an exclamation mark be placed on top of an equal sign (accent)

[respeex]

I want to create the same symbol the Latex code \overset{!}{=} produces using pure typst.
I tried accent("=", "!") but it places the exclamation mark directly over the equal sign instead of on top of it.
latex:
typst:

Is there any pure typst function to achieve this?
(without embedding latex code into my typst document)

[bluss]

I think the default way is $=^!$

And the function equivalent of sub/superscripts is attach.