Reproduction steps:
1. Create a new project
2. Import Input System package from package manager
3. Go File -> Build settings and switch the active platform to iOS
4. In the Scene create some buttons, make sure the Event System is using InputSystemUIInputModule
5. Set Play Mode to use Simulator Apple iPhone XR (this is done in Game Window, top right Game/Simulator dropdown)
5. Enter Play Mode and try pressing the buttons

Expected result: the buttons are responding to clicks
Actual result: the buttons are not responding to clicks (this is either due to cursor position being reported incorrectly or something to do with buttons themselves)

Reproducible with: 1.0.2 (2021.1.15f1)
Not reproducible with: 1.1.0-pre.5 (2021.1.15f1, 2021.2.0b4, 2022.1.0a3,)
Could not test with 2019.4.29f1 (simulator not available)

Not reproducible with built-in input

Notes:
1. The issue is no longer reproducible in 1.1.0-pre.5. It has been fixed between 1.0.2 and 1.1.0-pre.5 (since the selection is limited in package manager I was not able to find out the exact version)
2. The issue appears to be reproducible with all simulator devices