WebGL build on iPhone doesn't load

Hello,
I have this Unity game built for WebGL that runs well on desktop. I’ve played it on itch.io and it’s fine.
But I’ve tried on my iPhone XS iOS 15.7 and it doesn’t work (either on Safari or Chrome): I first get the message “WebGL builds are not supported on this device”, then it loads, reaches the end, and loads again… and the game never starts.
How can I fix this?
Thanks!
Stéphane

We meet the same problem. Seems it is the memory limit. If the scene is smaller or less few textures, our page can be loaded.