GPS trackers with SIM slots and cell radios have been available for ages, and easily enough found for purchase that I don't think mentioning them here adds mean

GPS trackers with SIM slots and cell radios have been available for ages, and easily enough found for purchase that I don't think mentioning them here adds meaningful risk. AirTags distinguish on Apple's UI polish - including the care for stalking mitigation - and platform integration, rather than their basic functionality.