The information that the HS conveys spiritually to the regenerate believers may not be easily extrapolated initially. Spiritually, the information is there in seed. In time, as the HS leads, the person will in fact, show fruit of those truths and be converted as he/she ascends to these facts, i.e. the simple fact, ‘believe on the Lord Jesus Christ and you will be saved’; the rest will follow as the person is sanctified.
In regards to the elect infant dying in infancy, prior to glorification, that person has more truth onboard than any of us will ever experience here in time.