Unfortunately, we know that people are literally paid to post pro China activism on the internet. You need independent verification to even be an anicdote.
It really goes both ways. You don't see pro-government support from western media because it doesn't fit their narrative. It's a two way filter. Stop thinking just because you have "free media", you'd have all facts. The fact that your parent commenter believe this is a 100% one sided matter shows how these brainwash propaganda can affect both sides.
Sorry to have to break it to you, but it is unanimous. An overwhelming majority of the population is against the extradition bill, and any shows of pro-government support are manufactured as propaganda.
If you're out on the streets and talking to people, then of course all of them are anti-extradition since that's why they're out. Ask them instead if they know anyone who is against the protests. I'm sure they'll tell you about HS friends or uncles or bosses who are for this bill passing. The last public polling had 11% in support of the bill which, while definitely not a majority, is also not insubstantial and is too large to be dismissed as a viewpoint generated entirely through manufactured propaganda.
[1] http://video3.mingpao.com/inews/201906/20190607_Mingpaopoll....
It was more or less the only site I could regularly use when I was there two weeks for work recently.