12 gamemodes exist in League

Let's say 1 gamemode every 2 weeks, that means a gamemode would be played by twice a year with some going for three times a year, yet we havent seen urf or one for all or even 6v6 this year, this isnt actually a rotating gamemode, i know riot needs to put em in the client, but jesus where are the gamemodes? and yes this is including those things like definitely not dominion and ar summoners rift and nemesis draft, but even doe i dont like these i count them in