Goalkeeper is usually lowest or bottom few, striker is probably one of the lowest %
Palmer's average for Chelsea is 83.3%, quite far ahead of the 72.7% against Slovakia
High 70s and low 80s when you have most of the ball like England's 63% possession
Foden and Saka were 83.3% and 89.6% respectively and could have tried a few more daring passes to try and create something. If they were at like 77% and actually created something sure, fine. 72.7% is low enough that your teammates will start to think passing to you is a bad idea
Can I ask where you are getting those stats from? I'm looking at FBREF and that's giving me very different numbers.