Best OPPO (or Oppo Equivalent) Smartphone under $300?

I've had Oppo phones for the past 8 years and I really enjoy them. I like their interface and price point, and longevity.

Looking to finally upgrade my Oppo of 4.5 years. The battery life is not workable anymore.

Looking for an Oppo (or even an equivalent brand that has a similar interface) that is under $300, has NFC, has the latest Android version possible, and has an Australian warranty. Not looking to import from overseas.

I have looked in the 'Budget smartphones under $300' Post, but I'm a bit out of the loop after so many years, and the top choices are either from overseas or will outdate quickly in terms of Android versions.

Thanks in advance!