[Solved] Win 10: Missing Polish Developer Keyboard, QWERTZ/QWERTY Layout Issues, and Solution Steps

Today my daughter came with the computer, complaining about the lack of Polish letters. At first it turned out that it has a QWERTZ layout. Attempts to use CTRL + SHIFT did not help.
After many searches, we managed to replace the keyboard with QWERTY, but the problem is that there are no Polish letters.
I tried to use the WIN + spacebar combination, but both keyboards appeared, only there was no way to change it. After restarting the computer there is no such possibility.
In the settings there is only the Polish keyboard (214) and there is no programmer's keyboard. Can you tell me how to get it back ????

In the control panel, Region and Language are well positioned.

Poland and the Polish language are set.

In the Keyboards and languages tab and change the keyboards in general, you can add a Keyboard.

Well, the problem is that there is ONLY a 214 keyboard, so there is nothing to change
There is no general or keyboard in the 10 wines. Instead, there are regions and languages

Did you go to "Advanced keyboard settings" in "Regions and language"? I have something like "Use the list of languages" and there is a drop-down list where "Polish - Polish (programmer's)" is

Yes, I did. But only Polish language is available

advanced options to the language and you can add whatever you want.
If it does not work, this playback from the backap because something might have fallen apart.

OK, it worked THX

OK, it worked THX :)

Added after 4 [minutes]:

I wanted to add a language, but it failed because there was no other version of Polish. But it turned out that you can add a keyboard (a programmer's keyboard will appear). After adding