One thousand times this. I am not giving away the keys to my bank accounts.
At least there is a process for unauthorized ACH debits. For this blatant breach of privacy, there is nothing.
Which is hopefully nothing beyond looking at transaction data without 2FA.
They're literally proxying the bank's login page just like a phishing site would, and I assume they're also selecting the "trust this computer" option so their access is more persistent. My bank does require re-2FA for larger transfers, but there's still a lot of damage I can do on a "trusted" computer without triggering another 2FA prompt.
Doing re-2FA for every outbound transfer, and mentioning the consequences of entering the 2FA code out of band (e.g. "enter code 123456 to confirm transfer of x$ to y" or "press OK to confirm transfer..." in a mobile app) should be the bare minimum these days.