Some other things to consider:
Fire safety – do the new “bedrooms” have adequate fire protection? In our building these sorts of proposals disappear due to the cost of fire engineering reports, additions to the sprinkler system, & wired in smoke alarms.
I also wonder if the strata plan would need to be redrawn to show any new bedrooms? Do the new internal walls form part of common property & need to be reflected on the strata plan?
A read through the National Construction Code (excellent lockdown reading) might also be useful to see what constitutes a bedroom for your class of building. Bedrooms need minimum dimensions & natural light.
https://www.abcb.gov.au/Connect/Categories/National-Construction-Code