Tire Tread Depth Difference in Tires

Good point! If the OP’s model and brand on the other 3 are no longer available, there’s more basis to press against the insurance company replacing with one ‘equivalent’ tire – especially because this is AWD.

And replacing all the tires at 4/32 isn’t quick right for the OP depending on miles driven and where they are driven (very little rain/snow in SoCal for example).