The HUE Skill and the direct integration will not help you with the sensor, because the Hue integration does only forward lights and no sensors at all.
Im my environment I have integrated door/window sensors, temperature sensors and Smoke sensors and all of them are transferred to Alexa with the hombridge-alexa plugin.
Matter will not help you too. because all of the vendors have to support matter and I don’t think that phoscon/deconz will support matter at any time…
here is a discussion over matter/thread: The new Matter-protocol? - #4 by manup