You can use a “+” symbol to make simple sub-aliases that all get sent to your normal email. If my email is me@domain.com any email sent to me+anything.example@domain.com will be sent to the inbox of me@domain.com but the email address is was sent to will be listed at me+anything.example@domain.com. Bitwarden can do this automatically when you generate a login.

If your email alias is ever leaked or gets used for spam you can just block all emails going to that alias.