[617a6572]

In the past, I utilized a standard Gmail account (no G Suite/Workspace) and had mail forwarding set up with a domain I had in Google domains. It supports using a wildcard (any [e-mail]). In terms of sending email as the alias, this is also easily doable:

https://support.google.com/domains/answer/9437157?hl=en

[extra88]

Last time I looked, your actual Gmail address was still included in such outgoing emails, the From address may be the alias but the Gmail address was also present in the headers.