Why is it taking so long for my apps to load on new IPad?

Presumably you are in the process of transferring data and Apps from an old to new iPad.

It is impossible to provide an absolute answer to this question. The time required to complete the transfer from old to new iPad, is principally a function of:

a) how much data needs to be transferred

b) the speed of your WiFi network

c) the speed of your internet connection - as your new iPad will need to automatically download Apps and other non-transferable content from Apple’s servers.

As such, if very little data needs to be transferred, the transfer process may be minutes; conversely, if a significant amount of data must be transferred between devices, the process may take many hours.

Maybe..... your Wi-Fi connection isn't strong and stable.....

Maybe..... you have a lot of Apps.....