This forum is for 3rd party developers, to submit suggestions to Twitch use https://twitch.uservoice.com/
As for your suggestion though, this may not actually have that big an impact on small streamers, as if you was to sort the streams for most games by ascending order, you’d have dozens of pages of 0 viewers, another few pages of 1, and so on. If people were to just support the lowest viewer stream, them going to that would push them many pages along in the ascending order, so others with the same idea to view smaller streamers would not see your person.
1 viewer can be a lot to streamers who get <10 on average, but changing the sort order would likely have minimal impact on actually helping them raise their numbers.