This is a recurrent topic. Perhaps T212 could pin one of these threads to the top of the forum.
As it stands right now every EU customer is given service through T212 UK using what is known as “passporting rights” i.e. licenced in one EU country serves all. This means right now EU customers have UK protection and compensation schemes.
However once passporting ends in January it is still to be seen what T212 will do as they are quiet about the matter. Other financial companies like Revolut or Interactive Brokers have already written to their clients to explain new arrangements (normally moving to EU entity losing UK compensation scheme).