The COMP rewards for mainnet have recently been depleted. Gauntlet just posted an on-chain proposal here to transfer 100,000 COMP (corresponding to roughly 150 days of distribution) from the Comptroller to the Rewards contract for Compound III on the mainnet.
Moving forward, we will add a section in our weekly updates which includes the COMP rewards runway in each chain. We will also create recurring proposals to proactively top up COMP rewards even if users haven’t claimed them.