According to the Snapshot governance page, the Aave community initiated a "temperature check proposal for launching rsETH on Aave V3 Ethereum network."
The proposal states that Kelp DAO is seeking community support to add its Liquid Restaking Token, rsETH, to Aave V3 on Ethereum. In addition, users who deposit rsETH into Aave will accumulate additional Kelp miles and EigenLayer points.