Investors waiting on the long-awaited public debut of Roblox Corp. finally have a date for when the tween-centric gaming platform will roll out its direct listing.

Hindenburg Research on Tuesday disclosed a short position in Roblox, saying the videogame company has been lying to investors and regulators about the number of users on its platform.

Roblox Corp., which built its reputation on games for tweens, thinks it can win over middle-aged workers. During the company’s first investor day Friday, Roblox said it wants to turn its gaming ...