Weird. I can’t find it on the App Store either, but I currently have a Colombian SIM in my phone. I downloaded it about a year ago with a USA sim, but can’t access it in the store no matter my VPN location
Discussion
Satoshi Converter is alright and had an update a few months ago. $1 on the AppStore.
https://apps.apple.com/us/app/satoshi-converter/id1576704429