Rename the image file name after the option -sd (here 2021-01-11-raspios-buster-armhf.img) according to your downloaded image name
"C:\Program Files\qemu\qemu-system-aarch64.exe" ^ -M raspi3b ^ -append "rw earlyprintk loglevel=8 console=ttyAMA0,115200 dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootdelay=1" ^ -dtb bcm2710-rpi-3-b-plus.dtb ^ -sd 2021-01-11-raspios-buster-armhf.img ^ -kernel kernel8.img ^ -m 1G ^ -smp 4 ^ -serial stdio ^ -usb ^ -device usb-mouse ^ -device usb-kbd ^