Yes, but that does not make them "true GPS trackers" - you are conflating the method of obtaining a position (GPS) with the method of reporting that position back to an observer (Cellular as with Jiobit, comm satellite like SPOT or inReach, bluetooth as with Tile, 70cm or 1.2m APRS as with BRB). GPS has no uplink (well, that users can access...) so suggesting that having a satcomm based uplink makes the tracker a "true GPS" tracker is very misleading.
I'm sorry to be a ranter, but there is just so much misinformation in the world of trackers right now, the bluetooth ones in particular are far less capable than the average buyer understands.
FWIW, tracking a kid or someone with dementia is going to work just fine with a GPS tracker with cellular uplink like Jiobit unless you live on a big ranch in Montana - in which case, maybe inReach.
Track employees? Their trucks or actually tracking them? If it's the truck I think there are better options out there that will give more information about the actual vehicle. If you're asking about placing it on their person I would think that could turn into not only an HR nightmare but a PR nightmare unless they were aware they were being tracked and agreed to it. If they agree to it, I think having them share their location on Find my Friends would be easier and free.
A button to reset the unit that's easily accessible? I've been in the market for one for my autistic son, but I could imagine him holding that in keeping it offline when he would take off in a public place.
U3 - It could be a problem, but will not completely disable the tracker. The device will still be associated with the account, but will need to be paired again. The reset button needs to be depressed for 20 seconds for a reset.
20 seconds is better than 5 or 10, but a paperclip button would be better option with kids, it going offline temporarily (till you pair it back up?) with a lightly verbal autistic child who runs off I find as a problem with design. If it just restarts it... still, paperclip hole.