I don’t live anywhere near Sydney but here in WA, I live in a fantastic community that does Christmas lights and everyone walks around looking at them. We even have a resident who dresses up as Santa, it is wonderful and all the kids get so excited. The have the most amazing light display too.

I know in my community the best place to find information is on social media. Have a look at some local parent Facebook groups and see if anything has been posted
In our community there are several streets that are designated ‘Christmas Streets’, which special road signs underneath the usual name sign. I don’t know if this is a thing anywhere else, but it means they won best light display the year before

I’m not sure if you mean you live in Sydney City or one of the outer areas that everyone calls Sydney now, but if you happen to be South West Sydney, Campbelltown has a lot going on. I can’t recall the Street names but the have incredible light displays. If you google that area it comes up with so much to do and see.

Bourgnis Avenue in Davidson is a really cool street to visit. It’s super busy with a great vibe. People usually park their cars at the end of the street or nearby an walk as nearly every house on the street is lit up. It’s so popular that there are usually a couple of Mr Whippy’s, coffee vans etc on site.