The only thing about carplay on iOS26 I have trouble with is the 'highlighted' icon (funnily enough own a Mazda and most of the time navigate with the scroll wheel) it's grey, which would be fine i can adapt from blue highlights to grey but a lot of the time the grey icons are VERY subtle and have to scroll forward then back to find where the highlighted section is, PLUS it's a bit annoying there are a few icons where it uses the SAME blue as the old highlights.
Now I do like iOS26 the liquid glass appearance its lovely but for use in a car and quick select and go I do think the system needs to be a bit less subtle and glass like and more of a HERE'S YOUR SELECTED ICON CLICK ME!!!