Thank you very much to you both sorted

@mitu hi there. I've finally sorted it. I didn't put a space between 'sudo nano /boot' .
All works brill now. Ta. :-)

@lurker that was the objective. not really how long the time is between a button clicked and received. but the delay time of the recorder in contrast to the button as GPIO. but if the delay time is so minuscule then you answered my question. its useless to compare. ty

Better late then never I suppose

https://github.com/libretro/RetroArch/pull/14628

so guys i had problems with the GPIOnext and the waveshare driver that i had. They both used pins at the same time.
Thanks mholgatem the programmer of the program he gave me some commands to type in,to configure the buttons with the right pins that are usable. So guys i wired this thing just with the single purpose of using pins who are not used and dont damage the raspberry or the display . So the commands are with my ports .

MY SETTINGS
[
sudo python3 /home/pi/GPIOnext/config_manager.py --pins 3,5,22,10,7,29,31,32,33,35,36,37,38,40

gpionext set pins 3,5,22,10,7,29,31,32,33,35,36,37,38,40

gpionext reload

sudo reboot
//if you soldered your wires to different ports you can add them in the line down below !
[
sudo python3 /home/pi/GPIOnext/config_manager.py --pins 29,31,32,33,35,36,37,38,40

gpionext set pins 29,31,32,33,35,36,37,38,40

gpionext reload

sudo reboot
]

@Capt_MorganCreek Hey!
Thank you very much for the file and the Help!
I had to change a little bit in the Script and use now uinput from uinput.
I ran into Problems with Dependencies... basically I haven't read thoroughly enough...
Everything else in the Script is the same.
Software works and the Buttons also... but! I have to make a new Plan on the Hardware itself.
It turned out that the Way I wantet to build the entire Thing does not work. It just does not fit...
Will have to see when I will have enough Time again to make a new Plan...

Big Thanks for the Help!