Before trying crisis mode. tTy holding the power button down for 30 seconds. That is one way to reset your bios.
For crisis recovery, Open a copy of your bios.fd file that you extracted from the Lenovo installer with uefitool.exe.
open search and in the text search look for .bin
In the search results you should find a result in the module PcdDXE double click on result and it will take you to the raw section.
Open in Hex by right clicking on the Raw section and scroll down to the offset that is listed in the search result.
You should see a file name with a .bin extension. that is the name for the crisis bios. on my legion 5 pro using gkcn53ww bios. the name of the crisis bios name is gkcn.bin. I think that Lenovo is generally using the first 4 letters of the bios name of you device,
Copy the original bios to the root of your usb that is formatted in fat32 and rename the file to GKCN.bin or what ever is appropriate for you.
The USB port next to the Power cable is the one you need.
To get it working you need to shut down the power, unplug the power cable, plug the USB into the USB port next to teh power cable, Press and hold fn+R, plug power back in and then press the power button.
Check if the usb access light comes on. If so leave it alone for about 5 minutes. If the file name is right, after 5 min it will reboot.
Open the bios after it is booting again. go to the config menu and go to the bottom and select the reset keys option and it will change the bios from setup mode to user mode.
no need to pull cmos battery.