I have a gravity track bike with flip flop hub, carbon fork, and caliper brakes similar to this one: Save up to 60% off new Disc Brake Flatbar Road Bikes - Gravity Avenue FXD Save up to 60% off new road bikes

It currently has 700x25 tires on it and has 120mm long rear thru axle (I don't know how to measure diameter but the middle of the hub was about 18mm):

How do I search for compatible wheels? I barely know anything about bikes and tried to research wheels but still don't know what terms to search in google to shop for replacement wheels. Any help would be appreciated thanks.