That list is sometimes an issue for a customer not receiving emails from Cloudflare. In this case I do not see the email you are using here on the suppression list.
One time I recall a customer using email routing was routing to an address on the suppression list. Most of the time, the email is being blocked by the email provider, normally caused by an issue with the DNS records for the zone (domain) or by the email provider. I checked one of your domains and see several verified emails and one pending. All using the same email provider. That leads me to suspect your DNS records are correct and the issue is with that unverified address with that provider. Next step would be to reach out to them to see if they can determine why the emails are stuck.
The email I am using is not the email I am having problems with. I have 3 of the 4 domains setup with email routing without any issue. Only 1 domain is not receiving the emails. This is not a DNS problem as I’m forwarding to an iCloud email address.
I can confirm the email address is valid as I can email the forward to email from other providers without issue. Plenty of emails are being received by the email address.
If you are still unable to remove and re-add the address and the verification has not arrived, I suspect we’ll need assistance from the Support team on a case.