Customize MFA so that it Sends OTPs to Our Platform Microservice for Email Generation

I want to enable MFA thats sends a OTP to the customers verified email. However, we have a lot of customizations in our emails and so have a dedicated microservice that creates the emails.

Can I get Auth0 MFA to ‘direct’ MFA challenges to our microservice? ie send the OTP to our our microservice and we can grab that and embed it as appropriate and send to the customer ourselves -so we dont need to use an SMTP server in Auth0 ?