I don’t know. I ran SRAM 9 speed for years with only the odd breakage, no more than reasonable. I built a new bike (Cotic Soul) last October on SRAM 2×10 and the chain breakage became a joke. I’m not a super power rider. All the kit was SRAM.
I happily used the whole cassette in both chainrings because 2×10 is supposed to be able to do that. (But the chain looks often times fairly S shaped to me). Anyway I didn’t run the extremes frequently, just the odd few moments, and they weren’t when the chains broke either.
This was 2 different chains, bought at different times and joined with the supplied Powerlink or whatever they call the 10 speed version.
I can only report what happened, and that’s what happened. So often it became a joke amongst my riding buddies.