Which approval did the drainer use?

Paste your own wallet address. Frostwit lists the spenders that still hold an allowance on your official stock tokens and USDG, including through Permit2. It is read-only: revoking sends approve(spender, 0) from your own wallet, and Frostwit never signs. Frostwit cannot freeze or recover anything. Robinhood and Paxos decide, and they usually need a police report or a legal directive.