I still use my Garmin Geko even now. Useful as a basic device recording a track I can geocode photos with, and runs for days on two AAA batteries. In a pinch you can reverse a track and go back the way you came too 😅

If it’s present, and loop guard is enabled, it would block the ports. This looks like an unmanaged switch so probably doesn’t have that feature.

Most of Netgear’s managed switch range have a loop guard function, even if they don’t do full STP.