My iPad Pro 11 won’t charge I tried different cable and adaptor still didn’t work. This is barely a month old iPad.

These support pages should help with troubleshooting:

Charge and monitor the iPad battery - Apple Support

If your iPad won't charge – Apple Support

Troubleshooting generally requires substitution of the Power Adapter and cable for another known-good item.

If you’re stuck, you might be well advised to take your iPad, Power Adapter and charging cable along to your local Apple Store - where the technicians will be able to test and assess your kit:

Genius Bar Reservation and Apple Support Options - Apple

Contact Apple Support directly (or go to your local Apple Store if there is one in your area). It is covered under warranty assuming you haven’t had accidental damage such as water damage occur. If you purchased AppleCare+ it will cover accidental damage with a deductible.