Following this vote: Adding a 2Pool base implementation of USDC/USDT, we are proceeding to add votes to add gauges for the 4pool (USDC/USDT/UST/FRAX) and 2pool (USDT/USDT) which will be soon be available on mainnet.
Another vote will need to follow to add them as base pool for the factory.
Please refer to Adding a 2Pool base implementation of USDC/USDT
You can find details about the two new pools’ assets by clicking here
4Pool vote: https://dao.curve.fi/vote/ownership/180
2Pool vote: https://dao.curve.fi/vote/ownership/181