Unable to verify our domain

I added a DNS TXT record for domain validation for submitting apps 3 days ago.

However, the message below appears and the domain verification is not successful.
“The verification code was not found for domain <our_domain_name>.”

It would be appreciate to help us to verify the domain.

Hello,

Thank you for reaching out in relation to Our Domain Validation process, the next steps will be sent to you via DM. Please refer to our domain validation resource: Domain Validation Explanation for any further questions you may have about the process.

Thank you.