System policy prohibits use of WiFi hotspot in Ubuntu 20.04

I am unable to turn on WiFi hotspot and WiFi in Ubuntu 20.04 together.

Only one thing can turned on one at atime. When I am seeking to turn on hotspot then WiFi is going to turned off. I want both turned on together

Why is this happening? That hotspot option is unable to be activated.

What I think I understand you to want (using the same wifi hardware for wifi network connection and hotspot at the same time) isn't possible. This is a limitation in either the wifi hardware or its driver, not a limitation in Ubuntu (or other Linux distributions).

Essentially, the wifi hardware can operate in either of two modes: standard mode (connected to a hotspot or router) or host mode (running as a hotspot). It can't do both at once -- think of it as like a two-way radio; most can't transmit and receive at the same time, because transmission would overload reception.

One solution for this is to obtain a secondary wifi device (one that plugs into a USB port, for instance) -- that would allow you to connect to the network with the built-in wifi device, then enable hotspot on the external one, allowing your computer to act as a (very expensive) wifi extender.