Drill bits are coated in tungsten carbide. Sometimes. There are a variety of coatings.
The drill bits you’re buying at the big box store are high speed still with some kind of coating to help them last a little longer. The specialty drill bits you’re buying for working on metal are also HSS with a different coating and probably different tip geometry.
End mills are milling/lathe inserts can be HSS or carbide, also with some tungsten coating. Importantly, these are sintered, and made out of dust.
Tungsten carbide is waaaay too brittle to work as a drill bit.
Drill bits are coated in tungsten carbide. Sometimes. There are a variety of coatings.
The drill bits you’re buying at the big box store are high speed still with some kind of coating to help them last a little longer. The specialty drill bits you’re buying for working on metal are also HSS with a different coating and probably different tip geometry.
End mills are milling/lathe inserts can be HSS or carbide, also with some tungsten coating. Importantly, these are sintered, and made out of dust.
Tungsten carbide is waaaay too brittle to work as a drill bit.
https://drillbitsusa.com/product-category/solid-carbide-drill-bits/
You don’t use solid carbide drill bits with a hand drill but with mills and cnc machines.
https://www.mcmaster.com/product/3723A51