I don't know of a chart that shows the change in hashrate per pool, ovJlyer time. But there are snapshots saved that might help tell the story.
Be aware that the color of the pool is not consistent from one time period to the next.
So, doing a cursory look, ... it appears that Foundry and Antpool dropped the most, F2Pool and Binance gained.
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The source of those weekly snapshots is the feed from Tilipani81, either from Twitter:
or Mastodon:
Which are saved from the real-time dashboard:
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