So Gardasil is only approved for "girls and women 9 through 26 years of age". Plus there wasn't much expectation of use outside of Western countries initially since it's not cheap and there are likely higher priority vaccines in developing countries (i.e. do you spend dollars on this or meningitis vaccines?). Use is probably pretty broad now, ~10 years post-launch.

Eventually they expanded the label to include "boys and men 9 through 26 years of age".

So all in all, a relatively small slice of the population, where for the Covid vaccine, they're trying to get it approved for pretty much everybody.