No do not amend for the wrong stimulus entry. That's going to delay your return a lot and might turn your small refund into a tax due. But that's before the new unemployment exclusion is considered. So just wait and see if the IRS sends you a refund or bill.
How much is on your 1040 line 30? That would probably be for the 2nd stimulus you said you didn't get. So subtract that from your refund to see what your refund or tax due should be.
