Where are all the 30+ at?

For context - I've been living overseas for the last 15 years, recently moved back to Brisbane. All my friends I had before I left have moved to different cities/states, or have their own life going on (how dare they)

I'm struggling to meet new people, I'm fairly outgoing and easy to get along with... Where is everyone hiding?

Edit: To clarify I WFH

Edit 2: Thanks to all the amazing folk posting some fantastic ideas, I was skeptical about posting on reddit as its a fairly vulnerable subject to a lot of people. I have, and hopefully some others have received some great ideas!