You can switch between SDR and HDR modes by going to Settings > Display & Brightness and selecting your connected display.
Your iPad also supports high-dynamic-range USB-C displays that use the HDR10 standard.
To connect your iPad to high-resolution displays, use a USB-C cable that supports high-bandwidth connections, such as the cable included with the display, the Belkin USB-C to USB-C Cable or the Apple Thunderbolt 3 (USB-C) Cable (sold separately).
IPad Pro 11-inch (3rd generation) and iPad Pro 12.9-inch (5th generation) also support Thunderbolt displays. Up to 6k for iPad Pro 11-inch (3rd generation) and iPad Pro 12.9-inch (5th generation) with Pro Display XDR.
Your iPad uses the DisplayPort protocol to support connections to USB-C displays 1 with these resolutions:
