Keeping Swiss bank account- UK citizen

I left CH in 2018 and deregistered immediately.

But I did keep my EFG bank account.

They told me at the time that it was ok because I was still receiving regular payments to my CHF account (spousal maintenance from CH resident ) and that they will see after BREXIT.

Since then nobody has contact me and I still have my account active.

I only use it to receive those payments but obviously I do not arrive to high amounts.

Should I remain silent and not ask anything?

Or will they just close it when doing some internal check ?

Any similar experience?

EFG is a private bank and (still) has a presence in London. If they didn’t want to operate your account, they would have let you know.