SF font is not showing on one file, while available on other

I have my master library file which I’m using for a while already.
For some reason while working in this specific file I can’t see any SF fonts.
If I open a new file - I can see it and use it. But with this one - no. If I copy-paste a text - it shows me a missing font and SF is not appearing in a list of fonts.
How can I fix it for this file?
I’m using the desktop version.