Managing Roblox screen time: Roblox settings and device controls
Roblox's help center says parents can manage screen time for children under 13 from Parental controls. Roblox only sees what happens inside Roblox, so many parents also use the controls built into the device.
Layer your limits
Use Roblox's settings for the game, and your device's family tools (such as those from Apple, Google or Microsoft) for overall limits across apps.
Make the rule predictable
Agree when sessions start and end, and give a five-minute warning. Sudden shutdowns cause more arguments than clear routines.
Check the source. Roblox changes its settings often. Confirm details in the official Roblox Help Center before relying on them.