The CVT’s of this time suck. I think you might be past average life. Look for another car.

"Continuously Variable Transmission Transmission"

There's a ton of factors to consider, but basically a CVT uses a belt and belts will always wear. The rate will depend on how you drive, how heavy the car is, etc. Usually they start slipping first rather than immediate failure. Truthfully 100k sounds about the time to me, especially in a Nissan, but if it's still accelerating properly ride it till it dies. And with the market the way it is it might be worth repairing anyway if the car is otherwise in good shape. They're labor intensive but shouldn't be any more than a traditional automatic to repair.

If you service it in a timely fashion you’re fine. There’s millions of vehicles on the road all using a CVT.

I never heard of CVT failed at 100k km. Yes CVT is somehow unreliable but i never work on a nissan that failed at that range, assuming oil and filter change is done regularly. The one that i replaced usually have a few things going on: one is they used the wrong fluid, sometime for extended amount of time, second is running low on fluid, third is service irregularly(or none at all, so the fluid is close to black when it comes out), or the one car with horrible quality CVT that known to fail. I honestly never replace one with good record that early, or at all, most tend to caused by maintenance issue.

160k km is not really at the point of failure either from my experience, i usually work on car with OG CVT that goes longer than that, sometime even to 300k. people usually replace their car anyway before reaching 300k. If it still accelerate well then keep driving.

Also pro tip: change the fluid half the recommended mileage, and disregard those that say "life time" and maintenance free. They say 80k you do 40k. And also be gentle with the acceleration. That's how you extend the life of a CVT.