Missing emails

Why am I getting emails from Cloudflare are you missing an email sent from… a Gmail to my .biz email. I don’t have any mx records that are not created by Cloudflare. How do I fix this?

May I ask if you’re using Cloudflare Email Routing feature, and your Gmail to send out emails in the name of your domain?

I am using Cloudflare email routing. Yes, I’m using Gmail to send out emails in the name of my domain. [email protected] forwarding to my Gmail address