Same thing here. "Mix-blend-mode: multiply" is working on computer browsers (everyone I tested), Samsung browser and Android Chrome but not in iPad/iPhone Safari or Chrome. I paste my code here but I think it's not about the code itself but Apple OS issue with this property.
<div id="container">
<div id="content">
<!-- Card content -->
</div>
<div id="red-background"></div> <!-- empty div for transparent effect -->
</div>
#red-background {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 1;
background: url(../imgs/fondo-rojo.jpg);
background-repeat: repeat;
background-color: #ffffff;
// background-color: #F40009;
mix-blend-mode: multiply;
// background-blend-mode: multiply;
border-radius: 50px;
}
I tried both properties: "background-color" and "background" with a red little jpg but none of them have worked. Same thing with "mix-blend-mode" and "background-blend-mode".