No. The only official Roblox app on iOS is the (for playing games). Any app named "Roblox Studio" in the App Store is a third-party tutorial or fake. Always check the developer name (should be "Roblox Corporation").
Mention that you can manage your games and do very light editing via the "Create" page on a mobile browser (set to Desktop Mode), but it’s not the full Studio experience. Roblox Studio Ios Apk
Websites offering custom mobile packages often bundle malicious code inside a standard Roblox Mobile Client app wrapper. Downloading these files risks losing access to your official Roblox account. Roblox Studio Ios Apk