According to Gigabyte's website, the motherboard is compatible with Intel I processors of the 14th generation, but only with the BIOS update F9 (see link: https://www.gigabyte.com/Motherboar...). It could still be tricky to update the BIOS if you only have the new CPU and have to flash via the USB BIOS.

So the answer is yes.

I've just made a new computer with this motherboard and a 14-generation processor.

Probably so, since the 14th generation from intel also uses the z790 chipset. But I can promise you nights