I have some of these questions too, but this is how i believe it all works. If im wrong, someone will hopefully correct me.
im pretty sure Tomtom navigation map updates have to be downloaded to a usb stick and then loaded to your truck. Word is that they are released every 3-6 months, which seems unrealistic somehow. Just how much changes in such a short amount of time is up for debate. These are optional updates, but i wouldnt let it go for to long. They are apparently free.
Get them from here
https://stellantis.navshop.com/#/downloads
Thats different from Rams (Stellantis) uconnect system software updates, which are OTA, except that i believe OTAs are suspended right now, according to a post i read on here somewhere.
This, while they figure out why batteries are going dead on many late model Stellantis vehicles. Suspicion is the vehicles remain "awake" awaiting OTA download completion that has stalled. Many threads on here about that.
My truck was built at the end of 2023 and has TTNAV.28.0.0 released 9/15/22, so older than your version and seemingly out of date more than a year before the truck was built. Strange ? I dunno !
My uconnect software version is MY23.T27.34
Interestingly there was a later version T27.46 released before my truck was built, but my truck didnt get it for some reason. I think by now there is an even later version, but what these updates contain, or are created to repair, fix, enhance, etc is apparently a great mystery we peons are not to be told, or perhaps i just dont know where to find that info. These update versions were designed to be shoved at us over the air without our knowledge or permission whenever The Stellantis Gods want to do so. Should they mess up, and they have, we get to pay a dealer to correct it all !
We buy these vehicles, and are left in the dark about so much. Thanks to forums such as these, we muddle our way through it all - at least I do !!