Biriyani is the food of marauding moozlum conqueror hordes.. easy to make on the go and those ancient caravans just came up with it by way of accident, throw some rice, spices and meat in there.. boom.. salim's your uncle (and dad)
Hyderabadi > Lucknowi > Kolkata (with huge chunks of potato wtaf)
Persians do a decent one, with dry fruit, resin etc.. very nice
https://www.behrouzbiryani.com/behrouz-biryani/bengaluru @Paitoo
south India, Tamil, Kerala also do fat ugly "red rice" version, its shite.
sri lankans also do a version "buriyani"
I had "Peshawari biriyani" once at an Afghan hole in the wall type place, probably not very authentic... it was bland and very meh.
Very curious about Pakistani biriyani, but I suspect it comes from either of the two main schools of it.. ie, Lucknow or Hyderabad.