Information about the global market size seems to be difficult to find to be able to ultimately verify or deny the claim, but the publicly available information on this site suggests that Chinese companies may be responsible for at least a significant portion of it, even if not based there specifically.
Original tweet: https://xcancel.com/Kaiserfish1/status/1838150204417343951#m
Danjiangkou is mentioned by name in the image (丹江口).
This reply in Chinese suggests that these things are in fact produced there:
https://xcancel.com/TAudience10953/status/1838438070154379297#m
Information about the global market size seems to be difficult to find to be able to ultimately verify or deny the claim, but the publicly available information on this site suggests that Chinese companies may be responsible for at least a significant portion of it, even if not based there specifically.