There are plenty of alternatives (e.g. Vietnam or Mexico), but China still offers enough advantages to make it the preferred option. This article explains it well: https://www.china-briefing.com/news/reshoring-from-china-to-mexico-how-prevalent-is-it-really/
If you look at various economic indicators, it seems likely that we have reached the peak of China's production.
Exports peaked in Dec '21: https://www.ceicdata.com/en/indicator/china/total-exports
Population - declining: https://www.ceicdata.com/en/indicator/china/population
Labour force participation rate - declining: https://www.ceicdata.com/en/indicator/china/labour-force-participation-rate
Employed persons - declining: https://www.ceicdata.com/en/indicator/china/employed-persons
Manufacturing wages - doubled in the past 10 years: https://tradingeconomics.com/china/wages-in-manufacturing
I'm not sure that they ever had any data because the data would probably suggest that management had the lowest productivity out of any employee. Middle management is filled with too many meetings, they're all promoted to a level of incompetency, and have delusions that they contribute more towards the success of the business than the skilled people below them.