Shimano MicroSpline HG+ 12mm Thru x 157mm 6-Bolt Disc 32 Hole Available Bicycle Rear Hubs
12 x 157 axles are often called "Super Boost"
This should correspond to the type of brakes you have on the bike.
The hub drilling is the number of spoke holes. It must match your rim spoke count.
These models are available for online purchasing and can be shipped directly to you.