My 8yo just spent 3 hours on Roblox and I didn't notice

Got so caught up in work emails that I completely lost track. He was in his room playing on his iPad and I just... didn't check in. Found him at 6pm still on the same game. Now I'm second-guessing everything about my screen time boundaries. Did I mess up? He's not glued to it normally, this was just a one-off, but man I felt guilty. Any other parents have days like this where you just surrender?