Can't figure out how to switch to UEFI boot mode?

Hello everyone.

I am using a Toshiba Satellite M840-A764, Windows 10 Pro. BIOS is Insyde Software version 1.50.

I'm trying to change my boot mode from Legacy to UEFI but I'm not sure if it is even supported or if I'm doing something wrong.

According to HWiNFO, my motherboard is UEFI capable, but when I enter BIOS setup, there is no option to change to UEFI. There's not even an option to disable Secure Boot or anything like that.

HWiNFO Screenshots: 1 2 3

MSInfo32 Screenshot: 1

BIOS Setup options: 1 2 3 4 5 6

For the record, I converted my disk from MBR to GPT, and upon restarting, there still wasn't any option to change to UEFI boot mode (I got locked out and had to reinstall Windows lol)

Does that just mean that my motherboard doesn't support UEFI and HWiNFO is wrong? Or do I need to update my BIOS? Or am I doing something wrong?

Thank you!