On Sept. 15, Ethereum completed the Merge upgrade after successfully transitioning the network to PoS. On the same day, the number of blocks created daily shot up by roughly 18% — from approximately 6,000 blocks to 7,100 blocks per day.
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Complementing this move, the average block time — the time it takes the miners or validators within a network to verify transactions — for Ethereum dropped over 13%, as evidenced by data from YCharts.
Source (https://cointelegraph.com/news/ethereum-merge-spikes-block-creation-with-a-faster-average-block-time)