I'm sure mine goes down in increments if 1. Sometimes it skips a number.

It definitely needs a lot of work. I only use the app to check charge level every so often and to start the heating in winter so the car is defrosting before I get in.

I don't know of any common problems. Timing chains are normally replaced when there is a problem with it, often you can tell there's a problem with a timing chain if it makes a ticking sound when the engine is running. I'm not sure on gearbox oil intervals. Its not in the manual.

1.6 turbo doesn't have a wetbelt, it has a timing chain.

That tells you if there are any updates for the audio system and nav maps. If it says nothing like yours does then there are no updates available

As far as I was aware they stopped the Sri when they facelifted the Grandland so I dont think there are any 2022 Sri's unless it's a pre facelift that had been sat around

I googled that part number and came up with quite a few results. It appears that the part is shared with the Citroen c5 aircross and Peugeot 3008. There's some on eBay

U0028 is the code fault on Vehicle Area Network (controls screens among other things) which fits with your screen going off

Have you checked in the vehicle settings that the option for the active headlights is turned on. The update may have turned it off.

Don't think the Grandland had wifi. Mine doesn't