Partner Visa Advise Needed

Bit of a complicated one here.

So, me and my boyfriend are in WA and have been seeing each other for 8 months, we don't live together and his 3 year working visa is set to expire in 1 month.

We have photos together at one of my family's events and photos with mine and his friends, a joint account we use for going out for dinner, I can probably get call logs from when he went to Taiwan for both his Father and Grandmothers funeral (seperate occasions), we call through instagram so idk how hard that would be. He is planning on moving in to my place I own with my housemate.

We don't have any major spends together nor joint bills.

What can we do? Can we do anything?

Do we have enough to get our application approved and gain a bridging visa?

What are our options moving forward?