How does a remote pilot land a fixed-wing UAV?
There's a wide range to techniques. In the hobby world, it's much like landing a full-size plane under VFR, you fly a circuit and glide path. Flaps, side-slip, cross-wind, retractable undercarriage, etc can all be used. The difference is that you have to judge the runway centre-line from some distance off to one side, which requires a lot of skill and practice. Also wind-sheer, gusts and unevenness in the runway surface are magnified by the scale. Fortunately the light weight allows models to handle landings that would wreak the full-size.

At the other end of the spectrum, large UAVs can land autonomously, similar to an airliner auto-land, using all the electronic aids of a modern runway.

In the middle are small UAVs, operated away from a runway. Small, slow UAVs can just circle a GPS position with the motor off, gliding until they reach the ground. Faster UAVs fly into nets or a vertical arrestor wire - again autonomously.

For completeness, I should mention that there is a specific branch of model competition for landing on a simulated carrier deck, with an arrestor wire.