What ARM server market? There is at best one ARM server chip per hyperscaler and most have zero ARM server chips. Conventional ARM server efforts failed because the ARM server vendors don't want to talk to mortals, only a very limited set of customers of which most intend to design their own chips and obsolete them. The amount of companies that failed to make their ARM servers available to the public is astonishing.
Linus Torvalds said that ARM needs to be widespread on the desktop, because you need a critical mass of developers targeting ARM. ARM server vendors don't want that critical mass, they want special deals with a handful of big companies which is obviously doomed to fail.