Subdomain ownership verification fails though the TXT record is published

Hi! I’m trying to add the custom subdomain
diario.biancachambo.com.br to my project “diario-lne”,
but the ownership verification keeps failing.

Netlify asks for this TXT record:
Host: subdomain-owner-verification
Value: ddbfc4318822216dd0c504b561a1b9af

It is already created and resolving publicly:
dig TXT subdomain-owner-verification.biancachambo.com.br

The CNAME is also already in place:
diario.biancachambo.com.br CNAME diario-lne.netlify.app

DNS for biancachambo.com.br is hosted at Hostinger
(nameservers athena.dns-parking.com and apollo.dns-parking.com),
not on Netlify. The apex domain is not in my Netlify account.

Could you please verify ownership so I can add the subdomain?
Thank you!