Is participation at these events strictly by invitation?
Where's the proof they're restricting Hayata from participation?, That's a huge claim to make
Besides, just "creating their own tournament" is plain disinformation, if you check out the WTT handbook from 2020; there was supposed to be a China Series ( Champions, Super Contender, Contender). I think it's only this year they were able to actualise it.
And before you say "China privilege", All capable member associations are allowed to do this, remember last year the European Challenge Series already happened across European Nations.
Germany hosted 2 feeder and a youth contender tournament this year, and they're hosting one more feeder and Champions event before this year ends.
Sweden hosted a Contender, a Feeder, and a youth contender this year. Doha hosted a Star Contender, Youth Contender and Feeder, same with Amman. All these are publicly available information.