i dont think there has been any in depth study of either afghani architecture or indian architecture or even persian architecture.
what has been declared as afghani style is the use of pointed arches, but now we definitely know that those arches which have been declared afghani were already used in the indian architecture in the pre islamic periods.
the prominent feature of afghani architecture is the persian element such as glazed tile work, ewan which are all completely persian.
british colonial era art historian have declared pre mughal north indian indo islamic architecture as afghani style, but i think a very similar architecture has been replicated already in pre islamic bagan temple architecture from burma.
having in depth discussion of what is characteristically afghan and indian or what kind of indian architecture already existed before the islamic intrusion will enable us to understand what's foreign influence and whats local element.
Afghani architecture in itself may have owed a lot to indian elements from the buddhist era. we dont know anything about afghan architecture in the pre islamic periods before arab/western influence.
this architecture which you have posted is a typical bengal sultanate period architecture especially from gauda, there is nothing characteristically afghan about it, or if it is, i would like you to point that out.
regards
