With ${registrationEmailVerificationLink} in place, you see the second format as the url the users are sent (/tokens/xxxxxxx/verify)? When did you see the other version, before you customized the email or could it be from a different email template?
i cannot put ${registrationEmailVerificationLink} in the activation form
If im using SSO, and okta is my providing auth for me, shouldnt the email redirect to: dev-XXXX.oktapreview.com/tokens/xxxxx/verify
and not mywebsite.com/tokens/xxxx/verify