fastboot boot twrp.img
PS C:\adb> fastboot boot mi-11-twrp3.5.1-recovery-v21.5.10.imgfastboot boot twrp.img
creating boot image...
creating boot image - 132458496 bytes
downloading 'boot.img'...
OKAY [ 2.938s]
booting...
OKAY [ 0.192s]
finished. total time: 3.130s
PS C:\adb>
Looks good, thank you, but is still not booting to TWRP.