Mileage - no.
It depends too much on road conditions, rider style, weight and strength.
There’s hardly even a useful consensus on tolerable degree of wear.
Some tires have two dimples molded into the wear surface. When these go, the manufacturer think it’s time to replace. A rider may choose to honor or disregard at own discretion.
Tires w/o wear indicators, you simply have to judge by the width of the flat stripe worn down the middle how much life there’s left.
About the only thing where you can expect agreement is that if you get the threads of the casing showing, you’ve left it too long.
I would recommend every 4 months.
If you make a chart and just add sealant every 3x per year you should be okay.
And it will still be cheaper than replacing tubes, less weight than tubes and less flats on the trail.