If you dont want to wait, you can use frija & odin to update to OneUI2 Stable. Use Home CSC file and your data is intact. No Wipe. Plus any future update can be done the same way or by inputting update.zip on the sd card and update from recovery.
You can also download the official Optus OneUI from Sammobile or you can update back to Official OneUI2 Optus Stable version when its finally released.
Does not break knox security or device certification. Non root.
ANDROID 10 Now has security updates directly from playstore which is accessible in biometrics security settings. And a Force Dark Mode for Apps which dont support dark mode, available in developer settings.
1 Download and Install Frija & Odin (versions as per XDA) 2 Use Frija to download firmware use Model SM 975F & DBT in CSC field 3 After Firmware is downloaded extract. 4 Start phone in download mode. 5 Open Odin..... panel on the left 2nd tab uncheck repartition. 6 click each box where the files need to go and add files. But use home csc if you're not wiping the phone. 7 Press Start in Odin should take 10minutes or so. 8 Phone Will Reboot, Android 10 all installed.
Some goodlock apps arnt yet compatible and synergy and substratum lite either.