how to connect my ipad to my apple tv

See >>> Use AirPlay to stream video or mirror the screen of your iPhone, iPad, or iPod touch - Apple Support

A little hard to help/advise you when you provide NO information about your iPad.

Can you, please, confirm what year and model iPad do you have/own?

The “A” model number can be found on the aluminium back of your iPad, in very small print, right under the larger bold print “iPad” on the back of the iPad.

What iOS/iPadOS version is this iPad, currently, running?

Please try to attempt to answer all questions asked.

Thank You.