Am I the next victim?

2019 GMC Sierra 1500 Denali 51,413 miles

Lifters or transmission?

I was traveling on I75 through downtown Atlanta around 6pm and iykyk… started approaching the first slow down/stop and while decelerating it felt like the truck hard dropped to 1st gear - like a snap. Then the engine became very unstable, mostly while giving it gas and particularly on inclines. Of course the dash started throwing errors:

Service ESC Service parking brake Stability maybe slightly impaired, drive carefully (from memory, not exact message)

I called the dealership service department and asked if it was safe to complete the drive to service. They said they couldn't tell me if it was safe to drive but it was running, yet rough and I really didn't want to pull over on I75 downtown in peak traffic nor wanted to take an exit and deal with downtown so I just babied it all the way to Kennesaw GA where my dealer is. Turned on my hazards got on the right side of the interstate and stayed under 65. Did gentle accels and decels and made it. it did not seem worse when I arrived, was behaving the same (low power, engine jumping and unclean gear changes).

Other info: Extended warranty through 2028 with 101k mile coverage. Obviously bumper to bumper is done.

Am I fucked?

Thanks for any advice/comments in advance.