There are a few mosques in Hong Kong, but the one I’m most familiar with is the Kowloon Mosque and Islamic Centre in Tsim Sha Tsui. It’s right behind an MTR exit I used to use when I lived in Hong Kong. And it’s also next to Kowloon Park, which I often visited when I lived there.
I was happy to see it when I visited a few weeks ago. In a summer of typhoons, the weather was perfect when I was there, including the day I went to Kowloon Park and saw the mosque.