Yes! You can look back and use your 2019 income for the EIC credit instead of 2020 & 2021. How to use the Lookback provision
https://ttlc.intuit.com/community/earned-income-credit/help/how-do-i-use-the-lookback-provision-to-m...
You can still use your 2019 earned income to get the EIC for 2021 even if you have no 2021 earned income. See this post
https://ttlc.intuit.com/community/retirement/discussion/can-i-claim-the-eitc-this-year-using-the-loo...
