Indeed, social security online can only query individual contributions.
As long as I know the amount paid by individuals over the years, I know how much the unit pays and the base of payment.
The calculation of basic pension is only related to the payment base, and has nothing to do with the amount paid by the unit.
You can also go to the local labor and social security center and check on the intranet.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.