For a Domain with ....@website.com, how can it get a proxiedmail?

I ask because there are many websites today asking for Business emails. I've encountered some who actually rejected ...@gmail, @protonmail etc. In such scenarios, does Proxiedmail have a workaround for this issue, so that a business owner can create a proxied business mail which wouldn't end with @proxiedmail.com

Also, what would be your suggestion in this case? I anticipate your Swift response, Thank You.