Hi Eddie!
I am having the same issue formonths now, checkout isn't possible through the app. Furhter since the last update my wishlist doesn't show any entries but listed products show the red heart symbol. If you'd say the shopping experience is supposed to be in the browser and the apps main focus is scenery management, that'd be ok. But there's no wishlist in the web store.
You are making it a little complicated to throw our hard-earned money at you 😉
Would love for you to offer a better solution ❤️
Thanks