If the person is not a dependent in 2020, then they would be entitled to the payment/credit as individual filers or by whoever claims them. That doesn't mean "not being claimed." It means "no longer qualifies as a dependent."
You might want to bookmark these links and read the IRS guidance.
Interactive wizards portal for determining dependency:
One for each EIP.
"Level Up" is a gaming function, not a real life function.