Bios showing HDD in windows bot priority and not SSD?

Sorry for the very late reply! I know I keep apologising for the late replies but I'm just so busy with life (looking for new job etc) and I needed my pc, before trying to fix it.

So I installed windows on my hdd, Windows automatically initialized it mbr(?)
I then reactivated my ssd to clean using disk part
But before cleaning ssd I thought I'll just check the bios and was surprised to see "windows boot manager" is gone!?

Do you think I should just leave it, as it is or continue to initialize gpt?

Yeah! Finally can play witcher 3 and didn't even have to reinstall windows again

I'm still learning and was wondering..
My next step is to delete windows on my hdd, is this the right way to do this? Go into "computer management" right click hdd and format?
Also (this may sound stupid) am I correct in saying if I add another ssd/hdd I have to initialize it in mbr? Keep them all the same right

Post a screenshot of Disk Management as described in Disk Management - Post a Screen Capture Image

Okay I'll do that once I get home but do I really need to? I just want to know if I'm deleting the os on my hdd correctly, as I have windows on my ssd already....

It depends on how you migrated to SSD, clean install? clone/image? Did you have HDD plugged in while installing? etc

With a screenshot we can see where your boot and system partitions are. If you are sure of these stuff, you can just format the HDD of course. Or delete the partitions and create larger one or however you wish :)

okay everything is running as it should

just wanted to say thanks! to everyone who helped me

especially TVeblen!! thanks for all your help buddy :)