I have a comparable switch WXKG02LM https://www.zigbee2mqtt.io/devices/WXKG02LM.html which also should send release information but doesn’t.
Dec 23 08:56:00 hassbian npm[4798]: Zigbee2MQTT:info 2020-12-23 08:56:00: MQTT publish: topic 'zigbee2mqtt/studeerkamer', payload '{"action":"hold_left","battery":100,"linkquality":18,"voltage":3005}'
Dec 23 08:56:00 hassbian npm[4798]: Zigbee2MQTT:info 2020-12-23 08:56:00: MQTT publish: topic 'zigbee2mqtt/studeerkamer', payload '{"action":"","battery":100,"linkquality":18,"voltage":3005}'
Dec 23 08:56:00 hassbian npm[4798]: Zigbee2MQTT:info 2020-12-23 08:56:00: MQTT publish: topic 'zigbee2mqtt/studeerkamer/action', payload 'hold_left'
Dec 23 09:00:38 hassbian npm[4798]: Zigbee2MQTT:info 2020-12-23 09:00:38: MQTT publish: topic 'zigbee2mqtt/hal', payload '{"battery":100,"illuminance":8,"illuminance_lux":8,"linkquality":5,"occupancy":false,"voltage":3035}'