We have proposed to add FRAX as well here: Proposal: Add support for FRAX
In fact, it was the first proposal before FXS. We wanted to make a single thread for both proposals but the rules required 1 thread per token so we had to separate them. But yes, we’re very excited to bring the FRAX stablecoin itself to Aave if we can get approved :) FXS would be extra sweet and deserved imo but the real product of the protocol is the decentralized stablecoin itself.