Question New M.2 cloned. How to see if it is booting from that?

[HogCooter]

MX330-X Case
X370 Gaming Pro Carbon MB
Thermaltake - SMART 700W ATX 80 Plus Power Supply
Ryzen 7
Gamerstorm CPU Cooler
AMD Radeon rx6600
32 ddr4
WD blue 500 SSD
Sandisk 500 SSD
Intel 670P M.2 2280

I cloned operating system to my m.2 drive, but cannot determine if it is booting from that.
When in BIOS it only shows the SSD's I have installed but I cannot see the M.2. In widows, I can see the M.2.
I went in and changed the boot from Legacy+UEFI to just UEFI and it didn't load it went back to the bios. Any suggestions?

 

[Lafong]

I cloned operating system to my m.2 drive, but cannot determine if it is booting from that.

Disconnect all drives EXCEPT the m.2 and attempt to boot.

It will or it won't.

If it will, it is booting from the m.2.

 

[USAFRet]

At the end of the clone process, your very first move should have been to:
power off.
physically disconnect all other drives.
Power up, and see if it works from the new drive.