I am not so sure if anyone will use Windows on ARM64 for avrdude. In that case, USB driver can be a problem. USB HID programmer and USB programmers with Windows WinUSB OS descriptor (Windows will automatically install WinUSB driver) should work. If your programmer is based on USB to Serial chipset, then it will depend on whether the vendor provides Windows ARM64 driver.
If your generic USB programmer (not using USB to Serial chip) is not recognized by Windows on ARM64, you may want to try out the git head version of Zadig which is now working under Windows on ARM64. https://github.com/pbatard/libwdi/issues/155#issuecomment-1445231926 Take note avrdude itself has WIndows aRM64 binary release here. https://github.com/avrdudes/avrdude/releases/tag/v7.1 -- Xiaofan
