Revitalizing the Economy of Coal Communities by Leveraging Local Activities and Investing More Act of 2021 or the RECLAIM Act of 2021 This bill revises requirements concerning the Abandoned Mine Reclamation Fund, including by expanding the eligible uses of the fund. Specifically, the bill allows the fund to be used to provide support for economic revitalization, diversification, and development in economically distressed mining communities through the reclamation and restoration of land and water resources adversely affected by abandoned coal mines. In addition, it requires specified amounts to be annually distributed from the fund through FY2026 to states and Indian tribes for reclaiming and restoring lands and waters so affected.