recent BIOS update Version:1.09, option of switching to 'AHCI' mode is
not being displayed and only 'Intel RST premium with Optane' is enabled
by default. Option of storage configuration is no more present. There
seems to be a bug in UEFI/BIOS firmware.Please forward it to concerned
agency so as to resolve this in future update. Motherboard used in said acer laptop is 'CFL Octavia_CFS' with 'Insyde
Corp UEFI/BIOS V1.09' in it. Please raise the concern to respective
agency and publish the updated BIOS on your support webpage.