Excel
I’ve seen loads of these for their products over time. Shedding some light on my assumption. These updates are meant for the device to be more stable as the Nothing X application is updated over time, so the device does not experience bugs as Nothing X is updated by the software teams. So really it is a firmware update, to ensure the product aligns with the software. This is likely why we (community) see very minimal verbiage on later-in-life products by Nothing in Firmware Update descriptions.