Select option is not hiding the selective options on Iphone with display none

I have a WordPress website where I want to hide some option in the select box they are working fine and hide in windows and android but in iOS its not hiding them.

android Screen

Laptop Screen

iPhone Screen

This is the code I have used to hide the options in all the devices for specific page.

.yachts-boats option[value="bus-transfers"]{
    display: none !important;
}

.yachts-boats option[value="car-transfers"]{
    display: none !important;
}

.yachts-boats option[value="van-transfers"]{
    display: none !important;
}