The full disclosure is: we've closed our previous bank account to open a new one. Google tried to send a payment to our previous bank account, it has returned, they instantly locked our payments profile and that's it, the whole story.
There were issues with getting our Mercury account validated with Google Pay.
Was you previous account Russian based? When was it closed?
If you changed it after the war began I can see how Google would notice a Russian associated company (Whitescape) moving to a new bank account just before/during the sanctions and see it as an attempt to evade them which should obviously be blocked.
It seems this is a lesson to move your company to a more stable country (Canada) as soon as you can. Not to wait until the the leader does something the whole world condemns.
(the substantive nature of this comment is that Google acts like an autocrat and hopefully this provides introspection for relevant stakeholders that can eventually influence Google to be more collaborative)