I have the force etap system on my Trek road bike.
The original 12-speed chain has over 9,000 miles on it. Lots of stressful miles of climbing and shifting.
I started to notice a little lag or sloppiness in the shifting. I use my part chain tool and saw that it was pretty well worn, surprisingly it was still at about 2% left. Anyway, long story short. I replaced it with a new one and it rides like a new bike now.
If you have SRAM Force AXS then the chain is a must have. Fortunately, it's a great value and lasts a good while.