As a designer involved in many iOS app projects I totally understand and agree. The process can be heavy at best, random at worst. Yet every time the critical mass appeal of the platform gives ample reason to offer an app for it. With the ongoing advent of iPadOS as a music and sound creation platform there’s a lot of fertile ground to cover with well-crafted plugins.
And please correct me if I’m wrong or cutting logical corners here, but targeting AUv3 will cover both Mac OS (10.15+) and iOS/iPadOS (13.0+), thus ensuring Logic compatibility too, right?