What kind of cable and/or adapter setup do you have? I've got this:
https://uniaccessories.com/products/uni-usb-c-to-hdmi-cable-30hz
Mine is USB-C to HDMI directly, but with a big block (probably the conversion hardware) at the HDMI end. It's been used for connecting an MacBook Pro to a display as well as a Chromebook to a TV. The big end also gets warm, suggesting that it's where the heavily lifting is going on. Since HDMI doesn't transfer power, the power is obviously coming from he USB-C end.
I tried it on my iPad mini 6 and a Samsung TV with HDMI input. It took a while for it to configure (seemed like over a minute), but after a while it mirrored what was on the iPad, but didn't fill up the TV screen. But it should self configure. Once it was up I tried a few things, and some apps automatically lock out stuff like video when they connected to an external display. Like ESPN, where I have a smart TV app for it anyways, but there might be certain rights issues with iPad apps mirroring to a display.
This has some tips. It might also be able to use Stage Manager for more detailed display settings.
Connect iPad to a display with a cable - Apple Support
Move, resize, and organize windows with Stage Manager on iPad - Apple Support