Millions of tons...? It's orders of magnitude less than that.
It's 56.1 grams for both buds and case. For comparison, 2 AA batteries is 46 grams.
They're tiny. In terms of e-waste, they're not even a rounding error. In terms of all devices to worry about, they're essentially last on the list. They're roughly the mass of the most popular consumer disposable batteries themselves.
(If you want to do the math, they sold ~90 million units in 2021.)