Unable to find the App Store on Home Screen or App Library

I can’t find the App Store anywhere not on my Home Screen and it isn’t on App Library. Last night I was looking for it and it was gone. I had similar problem like this when I had a iPhone 7 . I’ve looked on YouTube, Chrome, and Apple. I also have screen time and I saw someone else has it too ! I saw a reply saying “ It’s because it’s restricted “ I had my mom help me with the screen time code and every single time I change something the App Store appears for a second and disappears from my App Library, I had open the app when it appears and it kicks me out, I had try putting it in my Home Screen, it only stays for a second . If anyone, anyone ! Have answer please reply to this message thank you .

[Re-Titled by Moderator]