Movements were on at least 5 wallets

Good find. Maybe somebody is cashing out hardcore. Wouldn't blame them.

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What's also interesting is they ignored the inputs of 2 other deposits from 2020.

It is normal. If you have P2PK, then you move only coins from P2PK, nothing else. If you use a block explorer, which splits P2PK and P2PKH correctly, then it looks more natural: https://mempool.space/address/0430a00f6bea440b3300030f3283d5af7759d6330bb2cca2f43ae2dd8f408984be119c8b687f1eccef0a72a7b9166d330d40b0d193758b4654467d084aae79fbf7

Gotcha. This explains why the mining & send transactions don't show up for the address on mempool.space.