Not working correctly on iOS 14.7.1 – Revise IT Review

As stated in the title, I am running iOS (14.7.1) on a iPhone 12 Pro. I just downloaded this app and it is not allowing me to toggle between versions. It is stuck on Version (10.15) which is the default when you open the app for the first time. I will add that it is working on my Apple Silicon Mac but it is not fun squinting while trying to use this. Please fix this.
Review by 03E46 on Revise IT.