I may have misunderstood the parent comment - with gmail, you can add dots anywhere in the mailbox and it all goes to the same place (standard gmail, not workspace)
Obviously if you control the domain or use a provider who supports it you can add an alias with punctuation but then you might as well just use e.g [email protected] to track the email source.
e.g [email protected], [email protected] and [email protected] all are the same user and will go into their mailbox (which I have used to avoid the + stripping that some sites do)
[email protected] and [email protected] are two distinct users.
Obviously if you control the domain or use a provider who supports it you can add an alias with punctuation but then you might as well just use e.g [email protected] to track the email source.