Video on mobile - multitasking

The iPad now offers full external display support. The iPhone also has Picture in Picture. Allow the camera to be used while multitasking!!! iPad OS with external display allows me to use it almost like a computer. Yet I can’t play D&D with my friends on Discord unless I have my computer with me - because they CAN’T SEE ME!!! I can’t use other apps like my browser AND Discord. VERY ANNOYING!!! Zoom does it - why can’t you?!?