As the creation of new pairs against native USDC on Mento is a bit more in involved, we decided to separate things out - one CGP for the creation of the native USDC pairs on Mento and a second one for adding tether stablecoins to the reserve and migrating the 20m cUSD/USDCet curve pool to native USDC.
The technical details for the first one, i.e. the creation of native USDC pairs on Mento, have just been shared here for review: https://forum.celo.org/t/proposal-mento-upgrade-mu05-native-usdc-integration/7545
The plan is to submit this as a CGP on Monday and submit another one regarding tether colletaral and the 20m curve pool shortly after.