In most cases you must be using  UEFI BIOS and not legacy BIOS.  Also for UEFI, your disc must be formatted for GPT, not MBR. Confirm what you have.  
I had ran the Windows 11 PC Health Check and it said I need to have TPM 2.0 enabled. I went to support and drivers on Dell Support and there is no option for 2.0 using my service tag. So maybe I do have 2.0 and not 1.2. I read a bunch of posts and went to my Bios and went to turn the TPM on but is grayed out. That is where I am at and need help getting it turned on. Any help is appreciated.
Inspiron 5680 and Grayed out TPM in Bios