Can you make a phone call from iPad with sim and data plan?

No, not directly; an iPad is not a phone. You will need your iPhone for this to work.

https://support.apple.com/en-ph/guide/ipad/ipadf97892b2/ipados

No and never.

iPads are NOT iPhones or any other smart phone.

An iPad, alone, cannot make cell number calls.

You need an iPhone that an iPad can pair up to to use both call and SMS message fowarding and sending from an iPad.

This makes an iPad a remote calling and messsaging device to an iPhone.