Yes. This is the problem with the "just use a password manager" answer to phishing-resistance. They can be a line of defense, situationally, but you have to have them configured just right, and if you're using phishing-resistant authentication you don't need that line of defense in the first place.
Isn't this backwards? If the autocomplete doesn't show up that's a flag that the password is going somewhere it doesn't belong. If you're always copy-pasting from a password manager then you're not getting that check "for free".
Obviously SSO-y stuff is _better_, but autofill seems important for helping to prevent this kind of scam. Doesn't prevent everything of course!