Extra content with nav menu?

Hi,

I’d like to know if we could add “extra content” in the nav menu on mobile?
For example: if I have a phone number or a contact button in the header and this doesn’t fit on mobile, would it be possible to add it into the “elementskit-menu-container”?

Currently, we can’t do that and I can’t just override the template because as soon as there will be an update, I will be erased.

Any ideas about that?
Thanks for your answer, have a nice day.