Do I file a amended 2020 return?

In reviewing my updated return after turbo tax updated the 10200 reduction for unemployment my existing credits for federal recovery rebate and my American opportunity credit went up as well.    Will the difference also be sent to me by IRS without a amended return as well?   I read if turbo tax asked you about these rebates on your original return that you would get the updated refund without an amendment but It did not mention the American Opportunity credit.   I already e filed my return over a month ago.  My new refund is more than double what my old one was.