MBR2GPT cannot create EFI system partition

Hello all, hope everyone is well. Sorry for yet another w10<w11 post but I’ve really tried my hardest to use search functions and other YouTube to figure this out and I’m still stumped.

I’m trying to upgrade to W11 but can’t do so because if I enable UEFI then my BIOS no longer boots or even sees my windows installation anymore. It seems the way to fix this is to reformat my drive to GPT styled partitions? I’ve tried using the built in MBR2GPT on windows and just running into problem after problem. I thought it finally had it figured out but now it leaves me with

“Cannot create EFI system partition. Error: 0x000036B7”

On my SSD I have 2 partitions, first is one labeled "New Volume" and is 497MB, Second is my main partition labeled "windows C" and has 931GB of space of which 120GB is free.

I read somewhere else that this tool only works with 2 partitions on a drive set in a very specific way but I feel very reluctant to just “delete” random partitions on my drive or start splitting them.

What would the next steps be from here? I'm frustrated because I want the free windows 11 upgrade since I paid for windows 10 and should be eligible, my hardware all meets requirements but this software format error wont allow me to do it.

thank you all for any help

Jarod