Just a thought here, but not sure the garage is really the best place if you are using an extrusion type of printer unless you are putting it in an enclosure. Temperature extremes can cause issues with warping at the bottom layer and/or weird issues with cooling percentages.
So, if you go with an enclosure, you could mount the alarm in the enclosure. The Tuya X-Sense is recommended in this video: Best Smoke Alarm for 3D Printing Safety (2021 X-SENSE) - YouTube It appears to have hubitat support as well: [BETA] Tuya Cloud Driver (Limited device support) - #168 by jimhc
Amazon Link: https://www.amazon.com/X-Sense-Detector-Replaceable-Self-Check-XS01-WT/dp/B08SJGQTSP
Edited to add, would highly recommend a camera and installing Octoprint (Raspberry Pi or similar) for real time monitoring as well. While you will want to cut the power, that isn't going to put out a fire that has started and you may want/need visual confirmation of whether it is just smoking or actually on fire.
