Just a point i went through something similar in the UK during the year of 2022 (late Nov) with Santander for an account i'd had for probably a couple of decades.
Started with a minor deposit to the account to pay for something (death) i was informed the account had been 'frozen' a few weeks earlier to update my KYC records.
Thought OK, rang them and went through a 45 minute call where they were asking the in's and out's of a donkeys a*****e, information not pertinent to the bank itself or my relationship with them, this was along the lines of 'wealth, assets, inheritance, etc' - not being a UK tax payer i was acutely aware it was not their business.
However i indulged, and provided 'some' if not all relevant information to 'direct questions' rather than observe their question and noticed to a point that their lack of expansion on the question which could result in a different answer' in-todays world, note: it's illegal to lie to a bank, and the bank is obviously doing KYC-EDD 'Gov Snooping', so I played along and within the clear lines they set, i answered, IMO their clear lines left a lot of interpretation outside of them.
Alas around 3 months later they rang my elderly Grandmother (don't know why as they verified my details not once but four times). - she told them i was 'overseas' and had been for a very long time.
Nothing occurred for a little bit then the account became cleared again... (i tried to redirect the funds) could not (it failed) month later the accounts disappeared and a account closure process occurred and the funds were moved to another account i'd never heard of - reportedly a account they use to send cheques from.
During this period, never had a direct phone call to my phone (they have), letter to my address overseas (they have), letter to my address (C/O) in the UK (they have), email (they have).
This was during the blitz post covid where the HMRC was in deep s**t due to Gov debasement and destroying the economy, so looking for low - hanging fruit, coupled with Russia and concerns for not being able to look into overseas residents accounts sources, during that period something like 2m of us Non-Residents were de-banked, and something like 1-2m UK non residents were de-banked.
Now the value lost is neither here or there (no clue where they sent the cheque or even if they have as some people stated they have to fly to the UK to do a fund release form - not worth it for the amount) i paid for the flowers for the funeral with card in the end.
But it was a eye opener, and led me to reading the various groups, and likewise this forum.
I can't imagine what life would be like for someone tied completely to the UK / EU / US system and having everything frozen, for myself i've spent most of my adult life away from the UK, and pretty much am Chinese-Western now without the eyes (lol)
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Had similar with month or so ago (just confirm data) kinda irrelevant.
Revolut is required to ensure the information we hold on you is accurate and up-to-date.
To help us remain compliant, please take a couple of minutes to review and update your personal details by xxxxx 2024. We'll use your information for regulatory purposes.
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https://www.telegraph.co.uk/money/banking/barclays-to-debank-all-british-expats/https://www.theguardian.com/business/2023/jul/30/uk-banks-closing-more-than-1000-accounts-every-day
and the funny part: The judge authorizes the motion and then is shocked later that it wasn't carried out by Bitcoin or Monero 
