Page preloader doesn't show on iOS Safari and Chrome

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Hi, I made a page preloader for the website I’m designing but it only shows from my PC, my collegues see a white page instead of the loader, Safari from iOS also doesnt show the loader

Here’s a Read only https://preview.webflow.com/preview/nocodeinstitute?utm_medium=preview_link&utm_source=designer&utm_content=nocodeinstitute&preview=6696a392078834e6ce0003e969e6b0fc&workflow=preview