Where to Find one-time-verification= for TXT record

Hello Team,
I Was going through the doc Manually connect a custom domain - Webflow University Documentation
and want to set my TXT record as per screenshot

I am not able to find one-time-verification= for my site
where do I get the code ?

In your site settings on the Publish tab, where you add your domain, this is where you are given your DNS settings.

Sorry But I dnt see anything here with “one-time-verification=”

And when you scroll down? You should see the TXT record instructions somewhere. If not, you might need to contact support.

Not able to find, if possible can you send sample screenshot ?