I’m sure there’s a Strata Plan out there somewhere that doesn’t have electricity metering to individual Lots, but so far as I’m aware the greater majority (if not all) do. There would be a sub-board inside the individual Lots so that the electricity supply to those Lots can be turned-off, and the meters themselves may be centrally located – usually in a dedicated Meter Room or Cubicle.
The easiest way to check is to ask your individual owners to have a look at their electricity accounts, where those individually metered will show a numeric reading at the commencement of the billing period (typically 3 months), another at the end of that period, and by difference the electricity consumption for that period in Kwh.