When I lived in the u.s. and bought my first home, I had similar concerns as you as we were about to buy a lot of high end products to furnish our new home (a new car, dishwasher, vacuum, etc…).
We bought a subscription to “consumer reports” (https://www.consumerreports.org/). They test all types of products and give detailed reports on each product. They also listed some products as “do not buy” for whatever flaws a product may have - this convinced me further as there didn’t seem to be any partiality. We ended up making many purchases, all price ranges up to the price of a new car, based on their recommendations and don’t remember having any post purchase issues.
I don’t know if this can be accessed from your region nor if it covers any brands local to Australia, but it did cover a lot of imported products to the u.s. from Europe and Asia - hopefully this may help you as well.
Partner and I had just finished school and gotten really good paying jobs, we saved enough money to buy a house and new car and truck. I bought myself a new used truck to haul materials and products when fixing up the new house! 🙏