While characters like Lust, Envy, and Gluttony were previously shown in a trailer for Fullmetal Alchemist Mobile, they are now confirmed to be part of the roster.
You can take a look at the illustrations of Lust, Envy, and Gluttony for Fullmetal Alchemist Mobile below.
Square Enix revealed more information regarding characters that will appear in Fullmetal Alchemist Mobile.
The second list are the Homunculi, which includes Lust, Envy, and Gluttony.