I did a “reset” a few years ago where I moved to a fresh gmail address, forwarded my old one, and updated all my accounts to use Apple’s Hide My Email service, unique per sender.

After a few years of updating addresses that I’d missed whenever something showed up that was forwarded from my old gmail account, I shut down my old account.

No more spam, whenever I start receiving spam to a Hide My Email address, I deactivate it.