Fastmail lets you create masked email addresses. They are randomized and can't be linked to your main account. Great way to track who sells your email to spammers. You can create a new masked email for each temporary need and tag it. You can also disable them individually, so you stop receiving mail for that fake sddress.
Firefox Relay is meant for this. It can create a new mask in a single click, and it will forward emails to your actual address as long as you have it enabled. I'm not sure if you can send emails, but that's rarely needed.
I'm not sure how (or really, if) they keep their domain (mozmail I think?) from being blocked by websites as a source of spam.
For anyone on iOS or MacOS, there’s Hide My EMail built into iCloud services. It generates an email address and automatically sets up forwarding to your iCloud account. You can add notes to remind you what it’s for. You can disable an address at anytime in the iCloud settings.
Looks like Guerilla Mail still exists. Been around for years at this point. No idea if there's any controversy about them, but there are reviews out there giving them high marks.