This black thingy (technical term) would get attached to the K galley to hold the glass sink cover up when you attach the utensil holder to it.  (2016 – 2021)

These pawn magnets are used to hold the K shower curtain tight against the back doors.

This is the Diverter Plug that you use when you remove the 3M water filter when you winterize.  (2014 – 2017 models)

This is the spare key to the Volta system – don’t lose it.  The original one is in the battery box when you have an “L” model (it turns the system on or off – rarely used).
(2019 – 2022.   It is not provided for the Volta “Flex” System somewhere in the 2022 or 2023 model years and forward.)

And you get these keys with a 2020.5 “L” model with a roof rack.

Top one is for the “wine cellar”, middle one is for the locking knob on the ladder, and the bottom one is for the L Battery system (model specific, per above).

2020.5 and newer models come with these “RAM tracks” (no relation to RAM Promaster).  You can purchase a variety of devices to attach to them to mount things like tablets or clip on fans.