Go to the BIOS and reset the settings to default with F9 and save changes with F10.
Get into BIOS again and check if Legacy and UEFI boot options are enable.
If only Legacy boot window shows the mSATA, It seems the operating system was installed under Legacy instead of UEFI. It is necessary to install the operating system from the scratch.
Please follow Ubuntu community’s recommendation.
Few days ago I recommended you to use Linux.org steps on how to install Linux with UEFI. Please let me know how it worked.