The amount of transactions in blocks is still plenty high. Blocks are full, just of low fee rate transactions. This just means there there aren't a lot of folks trying to get their transactions prioritized. My mempool still shows 74 block's worth of transactions waiting to clear, and mempool.space shows 97 blocks worth.

So, the amount of activity actually hitting the chain is the same, because mempools still haven't cleared. We're not seeing any partially full blocks at all. It's just that most of the transactions waiting in the mempools are in no rush to make it into a block.