That's what the email alias company that proon bought last year and rolled into subscriptions is for.
Also, if you buy your own domain, which from cloudflare is like $10/year, you can turn on catchall and use anything@yourdomain and have it delivered. Then, if one of your anything addresses gets compromised, you just block all email going to there and move on.
It does but it is plus email addresses. So any half smart spammer will just remove anything in between the + and the @
With proton it is an entirely unique email address that cannot easily be tracked back to your email.
People have given you some good ideas, but here's another: DuckDuckGo has free email aliases. You generate a "duck" address and it's just some random email address that gets forwarded to your real email address while also blocking any trackers in the emails. And you can easily turn off an alias if it becomes spammy.
It's free and you don't even have to make an account of any kind. To "log in" to their web browser and use this feature, all they do is send you an email with a link to click to make sure own that target email address. Then you can generate unlimited aliases that get redirected to it. But it's up to you to track which alias was given to which website.
There's also a master duck address that you make up manually. I guess that's technically an account and that's the one you "log in" with if you install the browser on another device. You don't have to actually use their browser, and they even have a plugin for Firefox to generate the aliases.
Not as easy as having your own domain and forwarding email going to any address to your real account, though. But it's totally free.