Guided access is similar to DND mode on android. It is not as customizable as androids DND but most people find it better. It blocks everything except the app running. We can disable the basic functions such as volume . It is widely used by Mobile Gamers to concentrate on their games.
Step 1: Click on Settings and open it.
Step 2: Scroll down and find accessibility tab.
Step 3: Navigate to Guided Access option. Click on it.
You can directly search Guided access on search to navigate faster. I prefer it but you should know its actual location for reference.
Step 4: Turn on guided access option. Enter passcode you prefer and if you like to add finger print or face you can add it too.
How to enable Guided Access on control panel
Step 1: Go to Settings and navigate to control center.
Step 2: Following page layout is shown.
Step 3: Click on + on left side of Guided Access. It will go up and will be shown on control center.
This is how you can enable guided access and set up it for easy use.