Windows 11 Display settings getting reseted/ignored

Hi!

I've an issue with the display settings:
I'm using an HD-TV for Zwifting.
It's connected via HDMI to my Laptop.
Laptop and TV are in different rooms.
In the display settings, I've choosen to use only display 1.
When turning on the HD-TV (it's normally powerless) the view switches automatically over.
Although i selected to use only display 1 (the laptop-screen) it the view switches, but I'm fine with it.
But, when I finished my workout and turned off the TV, the view doesn't switches back to the laptop and stays on the, now turned off and powerless, TV.
Then I'm either forced to blindly open and change the display settings on my laptop and change the view back to display 1.
Or I have to open the display settings on my laptop, going back to my "paincave", use the mouse to select display 1, then the view switches back to the laptop, so I've to go back to it and confirm my choice, cause it will revert in a few seconds automatically.
So the questions are:
1. Why does Windows change my view automatically to the external display (display 2), even when I've selected to use only display 1?
2. Why doesn't Windows change the view automatically back to the internal display (display 1) when the external display is turned off?
3. Why does Windows change the display setting by itself to use only display 2, after turning it on, and then doesn't change it back, after turning display 2 off?
4. Is there any possibility to create an "shortcut" of sort, to change the display setting, other than using the Fn+F9 key combo on the keyboard?

Oh, and it's no option for me to unplug the HDMI cable every time.