I have the same truck with less than 5,000 miles and haven't noticed a knocking. I also made sure to use full synthetic when I did the oil change. While it may not seem like that should matter on an engine with such low miles, I had a Hemi previously and the only way to keep it from doing the infamous 'Hemi tick' was to use full synthetic. Completely different motor, I know, but still worth a shot. If you didn't do the oil change yourself, don't assume they used full synthetic either even though Chevy specifically calls for it.
2020 was the first year for that motor so it is possible it