Converting rel="nofollow" to rel="ugc"

[multiuser]

Hello,

since March 2020, google have applied the rel=ugc, whith is the appropriate rel for user generated content, like it;s in forums, blog comments etc.

In vb4, in admin panel, there is only the option for rel="nofollow".
How can we convert it to rel="ugc" ?
Probably the modification should take part directly in file, since there is no option in admin panel.
Can someone guide through this?

Thanks in advance for any help!