How many official super saiyan transformations are there already?
Super Saiyan
Ascended Saiyan(Super Saiyan 2)
Super Saiyan 3
Super Saiyan 4(Not canon)
Legendary Super Saiyan (Not canon)
Super Saiyan rage(Future trunks)
Super Saiyan Berserker(Kale's transformation)
Super Saiyan God
Super Saiyan Blue
Super Saiyan Rose


// Additional


Mystic/ Ultimate Gohan ( I wouldn't call it an actual super saiyan transformation.)
Ultra Instinct Goku (His new aura seemed to indicate it was a new transformation).