My iPad screen shuts down after 2 minutes while viewing

Presumably you have an iPad Pro with FaceID. Try enabling the Attention Aware feature...

Settings > FaceID & Passcode > Attention-Aware Features - set to ON

When set to ON - the iPad will sense your attention - and prevent the iPad screen from automatically dimming, or locking the display - while you are actively looking directly at the screen. The timeout period is determined by the Auto-Lock setting:

Settings > Display & Brightness > Auto Lock > select as required

Re: My iPad screen shuts down after 2 minutes while viewing

Wondering what you are viewing when this screen shut down happens:

Eg: Check in Settings > Display & Brightness

Choose how long the display remains active when not being used.. look for Auto-lock or screen-timeot

(Note: If the setting is greyed out you may need to turn off low-power mode before you can change it

What does you battery health say in settings? If you cannot view the maximum capacity in settings Contact Apple by call or chat from Contact Apple for support and service - Apple Support to have remote diagnostics ran.