Option to enter bios skipped on start-up after install

Support and Help
13

Does your system have Intel RAID or RST on (even if one drive)? You may need AHCI mode for drives.

Any older post:
https://www.dell.com/community/en/conversations/linux-general/area-51m-help-installing-linux-as-dual-boot/647f81b7f4ccf8a8de06d4a6