It has 4 fairly common ingredients and only needs a couple of days to create. You can be sure that China will make a spreadsheet with all possible combinations of synthesis and farm them out to their Universities for rapid development... and then they start hunting for the 'ideal' version... flexible, fast to synthesize etc.

The Manhattan project and moon landings happened because the US spent a significant % of it's GDP on the project. We might have Fusion already if they repeated it...

LK-99 is just chemistry... not nearly as complicated.