What is the DKIM record you are trying to add? If it’s a CNAME, make sure it’s set to “DNS only”. If unsure, can you show a screenshot of what you have set.
I currently i have both set
Host Name : selector1._domainkey
Points to address or value: selector1-techlead-pt._domainkey.Techlyn.w-v1.dkim.mail.microsoft
Host Name : selector2._domainkey
Points to address or value: selector2-techlead-pt._domainkey.Techlyn.w-v1.dkim.mail.microsoft
And waited or sync
The dashboard should show just selector1._domainkey under Name but is showing selector1._domainkey.... which means there is something afterward. Check you have just entered selector1._domainkey
Check that you have set the record as Microsoft has specified it. What you have entered doesn’t look right. v=DKIM1 would be a TXT record but selector1-techlead-pt._domainkey.Techlyn.w-v1.dkim.mail.microsoft is a hostname so using CNAME, you seem to have something mixed up.
Likely the record should just be a CNAME to selector1-techlead-pt._domainkey.Techlyn.w-v1.dkim.mail.microsoft.