I found a solution for the loading issue on iOS. Make sure ‘Legacy Shaders’ is enabled in your add-on settings, then export to html5 using the ‘mobile’ render path.
However, I’m running into another issue. The same project link looks completely different when opened on Windows, Android, and iOS. The textures are either extremely low quality and pixelated (android and windows) or almost completely show as a black screen (iOS).
I created this thread: Project exported to html5 looks completely different on Windows, Android, and iOS
Please feel free to make any suggestions on how I can solve this.