There are no partitions to install on

I have dell vostro and i wanted to install endevourOS. Problem emerges when i open up installer. it says “There are no partitions to install on”. I then checked in thunar and gparted and it sees only my pendrive i use for booting, not hard drive. I managed to disable bit locker and fast boot, but i can’t see drive (even unmounted). What should I try to do?

Is the laptop UEFI? Did you disable secure boot?

I would check AHCI settings in Bios.
Dell usually sets it to RAID controller.