I own a 2/21 build, 6.2 - 20,000 miles, over half towing a 5k RV, and no problems. So, from my sample size of 1, you'll be fine.
OK, so, you are on a Silverado forum, and of course, people are quick to post about their problems, so you are in the right place for folks to chime in about how bad their engines are. I rarely post to say how happy I am with my truck - who'd read that? I will say the lifter issues have not reached the point of a recall, or a successful class action suit, so the numbers, while noticeable, have not reached those action points. Lifter issues have hit all years, unfortunately - but at a rate that's been discussed on this forum to be less or around 2% of the engines built. Of course, if you own one thats failed, you would argue that number is too low.
I knew about Chevy lifter's when I bought my truck and I bought a drivetrain extended warranty. I'd suggest you do, too.
Good Luck finding your new truck!