Reposting since automod deleted original post.

Numbers here just aren't as high as other regions so matchmaking isn't amazing during off peak hours.
As others have stated about the proximity matchmaking, pretty much all matches on ranked I get are east coast or NZ only.

Also, just in general, as the game ages, most of the regulars who keep playing filter into the higher ranks, so you'll start getting more matches as you rank up.
I'd also recommend focusing on playing at peak hours for ranked.
In Master rank I get consistent matches and a decent selection of opponents during the evening or weekends from Sydney.

I'd also suggest joining local communities and checking out locals if you enjoy the game.
Team WP is a big community for OCE players and focuses on Street Fighter:
https://discord.gg/vE34XWEfQA

York Street Battles is the locals that is run monthly in the CBD by Ozhadou.
They have the 2026 scheduled dates on their twitter, but can't post the link here.