AWS SES Custom MAIL FROM domain verification got stuck in Pending for more than 72 hours

Hi,

I wanted to set custom MAIL FROM subdomain for my identity which has a verified DKIM configuration now. I followed all the steps and even tried some variations and waited 3 days for it to give me either failure or success result but it got stuck in pending status. I want to use mail as MAIL FROM subdomain.

I have only one MX record in my domain settings which has

• name mail.mydomain.com
• value feedback-smtp.eu-north-1.amazonses.com and priority 10

I have TXT field for this

• name mail.mydomain.com
• value "v=spf1 include:amazonses.com ~all"

I tried SPF setting without quotation marks, I tried to use www as subdomain as it was suggested as a solution in one post here

Since this got stuck in pending, I don't even know if am I doing something wrong? How can I manually verify this?

Edit: I am checking the MX and TXT config for mail.mydomain.com and it's failing only in Quebec Canada, I do not know if that is the reason?