Roblox apparently has done this for some desktop users via its icons. As you’ll see in the tweet below, the game has changed the icons for the player and studio programs.

Roblox has introduced age verification, trusted connections, screen-time tools, and parental oversight to enhance teen safety ...

Roblox CEO David Baszucki discusses safety concerns as the gaming platform attracts 85 million daily users, with 40% under the age of 13. ... An icon in the shape of a lightning bolt.