UEFA has nothing to do with points deduction in domestic leagues, and as a private company, the PL falls under England and Wales. The verdict was only in relation to a violation of EU laws. The PL is outside EU jurisdiction, just like the FoM isn't a thing in the PL, though it's part of the UEFA football umbrella.
You should take a look at the Premier League's own website:
"The Premier League is a private company wholly owned by its 20 Member Clubs who make up the League at any one time. Each individual club is independent, working within the rules of football,
as defined by the Premier League, The FA, UEFA and FIFA,
as well as being subject to English and European law".
That's the PL's own website saying that the PL is subject to both English and European law.
The PL is not a law unto themselves. The PL couldn't introduce a rule where outfield players are allowed to carry the ball with their hands, for example. UEFA would put a stop to that that through implementing punishments should their directives not be abided. UEFA has the authority to set rules that are applicable to UK clubs, and they have the authority to dish out punishments should their rules be breached, and they do this whilst operating under European law.
The PL signs up to, and accepts, UEFA's rulings, which is why I think there is some European legislation that continues to be at the very least relevant to PL clubs, even if it is not 100% legally binding. It is also possible to refer to precedent from outside a relevant jurisdiction. I expect the ESL ruling to be referred to within our appeal.
