I got the problem resolved. I went to Lenovo's Website:
https://pcsupport.lenovo.com/us/en/products/laptops-and-
netbooks/thinkpad-p-series-
laptops/thinkpad-p15s-gen-2-type-20w6-20w7/20w6/20w6001nus/downloads/driver-
list/component?name=BIOS%2FUEFI
And got the firmware from there (version 1.46). It had two files in it.
'N34ET46W.cab' said it was already installed and 'ThinkPad-
EmbeddedControllerFirmware-1.37.cab' installed and when it booted back
up the fan was working again.
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1954340
Title:
Fan stopped working after firmware upgrade
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