I am not getting messages on new ipad.

”New” suggests a change of device.

You’ll need to ensure that SMS (and optionally MMS) is explicitly enabled on your iPhone - and that Text Message Forwarding is also correctly configured on iPhone.

On your iPhone:

Settings > Messages > Text Message Forwarding - set to ON - and explicitly enable your [new] iPad from the list of devices.

Settings > Messages > MMS Messaging - set to ON

Also ensure that Messages in iCloud is enabled on both your iPhone and iPad:

Settings > [Your Name / AppleID] > Messages - set to ON

More information:

How to forward SMS/MMS text messages from your iPhone to your iPad, iPod touch or Mac - Apple Support

Fault finding if needed:

If you can't send or receive messages on your iPhone, iPad, or iPod touch - Apple Support

iMessages, SMS messages, email messages? We need more information form you.