@CurryPseudo found out that iOS simulator doesn't support comparison sampler states, see gfx-rs/wgpu#1715 (comment)
This means we can't run WebGPU proper on it, and it's quite sad for development.

Possible solutions:

• draft a native-only feature for immutable samplers
• add "downlevel" features to make it more compatible with GL, DX11, and things like iOS simulator. It would have a flag for comparison samplers, basically.
• push Apple to make the iOS simulator more capable
• live with the problem forever