Had this happen yesterday. I was changing out my wheels and deck and when I went to tighten my axle nut down the axle just broke off lol. These are ~2 year old Titanium 169 so I'm guessing it's not under warranty but I wanted to know if there's anything I could do through NHS.
Ti axles on anything post 2020 seem to be anything but trustworthy, as you are just one of many who have had similar things happen.
First point of call is the shop where you got them, if possible, as they tend to have more options rather than you just going to the NHS warranty page and filling out the form.
As others said, the truck doesn't look heavily used, so although the time frame might be a little long, the life of the truck is far from done there, so that should be good grounds for a warranty.
Lots of these have been warrantied in the past, so if nothing is able to come from it, others have bought a new set, waited a while and then sent the old ones back for warranty, which might sound bad, but it is getting the replacement for a known faulty product that some people and places might not want to deal with, as I had seen and heard from other experiences.
Meanwhile, you can either return, sell, trade your new ones if you don't want to ride them any more, or get plain hollow instead, which don't seem to have any issues and still skate great, or standards for that matter, although some people do find they don't like the weight of them in the wider sizes.
A few options anyway.