I was mainly doubting whether it has enough significance to be a `=suburb`.

From osm wiki: "Use `place=suburb` to identify a major area in a `place=town` or `place=city` with a distinct and recognized local name and identity."

From https://wiki.openstreetmap.org/wiki/Zh-hant:Hong_Kong_tagging#%E5%9C%B0%E5%8D%80_Place : "... Section within an urban area, for example, Mong Kok, Tai Wai, etc."

I feel like https://www.openstreetmap.org/node/12772775735 should be `place=hamlet` at best like https://www.openstreetmap.org/node/10752374968 , and from online information it seems like the two villages are abandoned, in which case `place=locality` may be more appropriate.