That's because you are not affected by this changes. They are actually very transparent about it. In my case, since I do cross-border business, they've provided all the details in the email:
* * *
> As a result of the UK leaving the EU, major card networks now
> consider transactions between the UK and European Economic Area
> (EEA) to be cross-border. In light of this, we will be making some
> changes to fees between Europe and the UK on your account,
> starting 1 July 2022.
>
> Your current Stripe fees are:
>
> - 1.4% + £0.20 on card transactions for all of Europe, including the UK
> - 2.9% + £0.20 on international card transactions
>
> Your new Stripe fees will be:
>
> - 1.4% + £0.20 on domestic card transactions in the UK
> - 2.5% + £0.20 on card transactions between the UK and the EEA
> - 2.9% + £0.20 on other international card transactions