Does your SmartTV support AirPlay?
Assuming that you have downloaded and stored purchased media to your iPad, you might consider using AirPlay to wirelessly play this material on your TV.
Use AirPlay to stream video or mirror the screen of your iPhone or iPad - Apple Support
Alternatively, you might use a wired HDMI connection - for which you will require an appropriate HDMI Adapter and HDMI cable. By example, depending upon you iPad model:
- USB-C Digital AV Multiport Adapter
https://store.apple.com/xc/product/MW5M3ZM/A

- Lightning Digital AV Adapter
https://store.apple.com/xc/product/MW2P3ZM/A

For media that was purchased via AppleTV+, download and install the AppleTV+ App intended for your SmartTV. Your TV may already have an AppleTV installed - that simply needs to be enabled from your TV settings; others may require you to download the App from the TV Manufacturers App Store - again, this being accessed from your TV sertings.