It seems the author started from a desiserd conclusion, and strung together fact(oid)s to support it without any understanding of them, sometimes making huge mistakes.

For example the monocrystalline blades, which are touted as some holy grain, were in production engines on both sides of the iron curtain by the 70s. China has mastered this technology by the 2010s at the latest.

As for airliner engines, I looked up both the LEAP and the PW1000 and their 'hot' part - the turbines - have fairly conservative specs, roughly on par with these aforementioned 70s US/Soviet fighter engines. This is the technology tha's more or less shared between military and civilian engines.

The big Western advantage comes from manufacturing the bypass fan - the composite blades and the high-speed gearbox connecting them to the jet 'core' are technologies that the West has a huge lead on and that's why the reason comparable Russian and Chinese engines don't exist.

But strictly speaking, that's not really directly related to the tech in the turbine 'cores' which most people refer to when speaking about jets and not a peep is made about this in the article.