There is an open issue about it, it until then, you can provide three override config in the smtp service, and there should be a function called send_raw_email in there which you can override and manage sending the email yourself.

for the send_raw_email you have any reference or am I looking at the right place here https://supertokens.com/docs/thirdpartypasswordless/email-delivery/pre-post-email ?

For send raw email, have a look at https://supertokens.com/docs/thirdpartypasswordless/email-delivery/smtp/change-email-content

The above link talks about overriding another function get_content, but there is another function in the same type called send_raw_email. So instead of overriding the get_content function, override the send_raw_email one