Turning off ad blocker on my new ipad

There is no native Ad-blocking included with iOS/iPadOS.

If you have elected to install an Ad-blocker App from the App Store on your iPad, the App should have appropriate guidance on its setup and use. However, depending upon the Ad-blocker that you have installed, if installed at all, it will either be implemented via Safari - or via VPN.

Safari-based Ad-blockers can usually be disabled from Safari settings:

Settings > Safari > Content Blockers - disable as necessary

VPN-based Ad-blockers may need to have the corresponding App uninstalled - or the associated VPN profile removed from VPN settings:

Settings > VPN