Hey Ian - I would troubleshoot your street photography game. It should work regardless of age in my opinion. I’m 30 years old approaching all ages, girls with their mom, girls with their boyfriend. It’s all about how you approach them.
Half the people do tell me to fuck off, but the other half don’t. Keep approaching people and eventually someone will say yes. I’ve done street photography in NYC and got a lot of people to shoot with me. It all came with changing up how I approach the strangers (show them your portfolio right off the bat helps)