I think $10M is right. The options cost $0.04 each yesterday (per the tweet), so spending $22,000 would get you 550000 options. Those options are now worth $18.30 (per the tweet) for a total value of ~$10M.
The listed option price is the price per share, and a standard option contract is 100 shares of exposure.
The screenshots seem to show a total traded volume for yesterday of 260 contracts (26,000 shares), way smaller than what was suggested.
Furthermore, nothing makes it clear that these were all the same person. And the open interest went down that day so at least some of this volume was buying to cover.