Starlink Gen 3 PoE Injector Gigabit, 3 in 1 Starlink Ethernet Adapter Gen 3 with 6KV (10/700us) Surge Protection, 100-240Vac Input & 150W 55V Output for Starlink V3, PT-PSE109GXRN | 160W for Starlink V3 & Starlink standard 4/4x, 2 PoE Ports Output with 6KV (10/700us) Surge Protection, PT-PSE109GAT-160

Looks like some hardware manufacturers have started to make custom boxes for this. https://www.amazon.com/Starlink-PoE-Protection-100-240Vac-PT-PSE109GXRN/dp/B0D66LH7HQ

I use this between the Gen 3 antenna and a Unifi Dream Machine Pro. Eliminates the stock router and power supply. Works great. You might be able to find it, or something like it, in Australia: https://www.amazon.com/dp/B0D66LH7HQ