Then you must not have read the linked article, which mentions three companies that have done just that.
Roaming charges made an unwelcome reappearance for UK mobile users heading to mainland Europe after Brexit. EE, Three and Vodafone were all quick to reintroduce the daily or monthly charges to use their mobiles while in the EU – which typically add £2 a day.
I’m in Northern Ireland and haven’t heard of a single company that dropped free EU roaming.
Then you must not have read the linked article, which mentions three companies that have done just that.