I think they did, but then found it too much effort to maintain (I think there was also some hacking scandal? I forget)
For what it's worth HK internet presently uncensored, though ironically TikTok pulled out of the HK market as they felt it was too expensive to comply with Hong Kong laws given the size of the available market here.
DouYin is still available in HK though -- not sure if DouYin is available in US/Euro market or not??