when you try to change the signature there are 2 areas where the code 1E 95 0F is displayed. If you try changing the signature in the wrong position, then will it show the error message 'microcontroller not found'. I did the same mistake once. I would suggest you rely on the find option in the Edit menu and search for the code.
Edit > Find > Search 1E ...
The new generation of AVR chips created by Microchip no longer use the same ICSP protocol as the old ones. Instead they use a new protocol called updi.
You need to use a different sketch and wiring to turn your Arduino into a suitable programmer. More information can be found here about how to do that.