>>96044865
fluffwise, normal dwarfs exist in aos
rulewise, normal dwarfs still exist as part of the cities of sigmar faction
modelwise, normal dwarfs were only the miniatures leftover from Warhammer fantasy and were recently put back there with the release of the old world

whether the rules and the fluff for them are also going to be removed in a year or two now that the models are gone is unknown, as is unknown whether gw will ever make a third order dwarf faction to sit alongside kharadrons and fyreslayers

the easiest solution for you is to use the normal dwarf models with the rules of another army, either cities of sigmar or chaos dwarfs since these two have (or are going to have) cannons, but it's a square peg in a round hole situation for you, I'm afraid