Pneumonia vaccine will be pretty much useless for Covid induced pneumonia because covid will make the older person in bad physical shape so weak, there is little chance of killing the pneumonia bacteria. Vaccine does not “prevent” infection, only function of vaccine is to create anti-bodies. If pneumonia is from non-covid origin, the vaccine can be very useful due to anti-bodies present to kill the pneumonia bacteria.
However, the cause of death is almost always listed as pneumonia - NOT influenza.
I find it curious that the USA medical community urges elderly and infirm Americans to protect themselves from influenza induced pneumonia, but they say NOTHING about Covid induced pneumonia.