A couple of must-have (IMO) accessories that I pack with my spare are the following:
Wheel hanger pins - (
https://www.amazon.com/WHEEL-CONNECT...s%2C177&sr=8-2) These 14mm x 1.25 pins screw into the lug bolt holes in the wheel hub, and make installing the spare a 2-handed task instead of 4-handed. Hang the spare on these pins, install a couple lug bolts, then remove the pins and install the remaining lug bolts.
Air Compressor - (
https://www.amazon.com/Fanttik-Infla...s%2C244&sr=8-3). I received one of these for father's day. Great for putting a few psi into a tire that develops a slow leak and for correcting the psi if you receive a low pressure warning.