What’s a common property specification?
Common property is anything that is not lot owner property. That seems a trite statement, but on strata plans it’s easiest to determine lot owner property. Anything else is common property.
If it’s a new building I would get the building manager or other person to take an inventory of things like lifts, gym equipment, furniture, carpets, as a record of what existed at inception. Pictures are a perfect record.
The developer is not obliged to do anything like this, nor are they obliged to provide what was in the glossy brochures that they used to sell you the building. You’ll find in the fine print that the brochures do not form part of the contract.