How can I fix the Permissions Policy header?

Referring to the red warning here:

Same for Scan results for https://meta.discourse.org/

On my main domain, I added headers using Nginx to address this but not sure where to add this for my forum subdomain.

Is there somewhere to paste config line in the admin area?

There’s a discussion related to the issue from a few years ago: FLoC network opt-out. There’s a suggestion about how to set a Permissions Policy header in this post: FLoC network opt-out - #16 by supermathie.

Possibly there are more recent topics specifically related to Permissions Policy headers.

Is there any point to put any bigger effort on that because it isn’t too well supported by browsers?

Thanks Simon!