For banking exclusively, I use an insecure old phone with all the Google stuff updated through the Play Store. This phone is only on, without a SIM, behind a VPN, when I make a transaction. Battery lasts forever.
And yeah, Google don't like people who won't allow them to fuck around with Android phones.
I stopped using Ventoy. I don't trust the OSs installed by means of it, sadly. Also, lost any hope of a clarification on the issue. Yes, you should not use it for the time being.