HC-SR04

Low power Ultrasonic range-finder:

CS-100 based HC-SR04 (3.3V)
NewPing with modification to support ATTiny1614
BSS84 MOSFET to switch on HC-SR04 (inverse), or power directly off GPIO

Energy usage

20uA background =
3mA for ~150ms every 10 mins = 0.45mAs