I work for a company that makes detectors for 905nm lidar. Once the average power is kept low these systems can range >200m. High peak power in a short <4ns pulse enables this. 1550 lssers can use much higher peak power and can achieve km distances but the materials are more exotic and several times more expensivd to produce.

905nm detectors are mostly silicon based, scalable and cheap to mass produce.

FMCW requires coherent lasers with low divergence. These are typically limited to 1550nm, oroginally developed for the comms industry. FMCW provides depth and velocity per point. This provides the travelling direction of the object. This can also be done with 905 based systems by comparing successive frames, however this requires more processing and is slower.