Just to expand on that a little, there is no legislation surrounding what documents are to be provided on these online portals that I am aware of. These portals are usually offered as a feature offering of the business.
Agree with kaindub, you may find that many documents are simply not pushed onto the online system for some reason, be it dubious or otherwise.
The only way to inspect all records held by the agent is to do an inspection at the place they are held, usually the agents office.
Even then documents may not be available or have mysteriously gone missing and if the inspector is not aware they existed in the first place, they would be none the wiser.
If you look at the disclaimers on pre purchase strata reports, you will probably find a clause about documents not being made available at the time of inspection – there is good reason for that!