Thanks for the response Andi! 100 Days of SwiftUI by Paul Hudson is pretty good. It's free, too. I'm not sure if it's purely SwiftUI though, but you will eventually, no matter what, run into UIKit after a while.
WWDC21 Scholar. I like to read manga and write about Swift. Check out my app, Find — look for text in real life, with outrageous speed. getfind.app