How do you get the FPX Malphite Signature Icon?
It was a mission or event reward. Riot's description in the client reads: “Honoring Doinb's winning Malphite in the 2019 World Championship.”
Is the FPX Malphite Signature Icon still available?
No. Riot tied the FPX Malphite Signature Icon to 2020 (mission reward), and it does not normally bring back past event rewards or bundles.
