iPad mirroring

If your intention is to connect an iPad with a Lightning port to an external monitor, you must use the Lightning to Digital AV Adapter - and connect using an HDMI cable:

Lightning Digital AV Adapter

https://store.apple.com/uk/xc/product/MD826ZM/A

The 2018/2020 models of iPad Pro - and the new 2020 iPad Air - are able to connect with some external monitors using a direct USB-C connection; if so connected, the iPad drives the attached monitor using the DisplayPort protocol. Alternatively, USB-C equipped models of iPad can connect to a TV or monitor using the appropriate Digital Media Adapter and HDMI:

USB-C Digital AV Multiport Adapter

https://store.apple.com/uk/xc/product/MUF82ZM/A

Alternatively, you can mirror wirelessly to an external TV/display using AirPlay - requiring either an AppleTV box to be connected to your TV, or the TV to natively support Airplay:

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