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I have a problem with VH properties on different mobile browsers

So I took these screenshots from a Samsung note 9 using Opera browser and the second is an iPhone 11 using Safari, notice the arrow at the bottom looks good when using Samsung but not when using iPhone. It’s set to absolute 10vh from the bottom and the top is set to auto, I also tried using % but that didn’t help.

Samsung

iPhone


Here is my site Read-Only link

Is there a way to set different properties for different browsers?