How do you get the Season 2023 - Split 1 - Flex Iron Icon?
It was a ranked reward. Riot's description in the client reads: “This icon was earned by finishing Iron in Flex Queue in Season 2023.”
Is the Season 2023 - Split 1 - Flex Iron Icon still available?
No. The Season 2023 - Split 1 - Flex Iron Icon was a ranked reward. To earn it, you had to reach Iron in Flex during Season 13 (2023). Riot does not hand out past ranked rewards again, so you cannot earn this icon anymore.
Released in 2023

Season 2023 - Split 1 - Solo/Duo Challenger Icon
Released in 2023

Season 2023 - Split 1 - Flex Bronze Icon
Released in 2023

Season 2023 - Split 1 - Solo/Duo Grandmaster Icon
Released in 2023

Season 2023 - Split 1 - Flex Silver Icon
Released in 2023

Season 2023 - Split 1 - Solo/Duo Master Icon
Released in 2023

Season 2023 - Split 1 - Flex Gold Icon
Released in 2023
