Boot Menu for Two SSD

Good morning, I work on a Red Hat system regularly at work so when I found myself with a spare SSD at home, I wanted to give the environment a go at home to more familiarize myself with it. So, I now have my Windows OS installed on one SSD and Red Hat installed on the other. The impetus for my question comes from the difficulty in booting to one or the other using UEFI.

I am able to choose from one or the other within the BIOS and once I'm in they both work swimmingly. However, a few times I have booted into Red Hat, restarted and then found that Windows as disappeared entirely. No matter what I have tried, this usually renders the SSD unreachable and I've had to reformat/reinstall Windows. Whether that is what I actually have to do, I am willing to accept that it almost certainly is not. I understand why it is happening, Windows & Linux have two separate boot loaders and one doesn't automatically detect the other, etc. etc.

Most of the discussions online deal with same disk partitions which have not proved particularly useful. EasyBCD, or a contemporary, don't recognize the Red Hat disk that definitely exists so whatever witchery that application WOULD do will remain a mystery to me at least.

I can certainly reinstall Red Hat with whatever options you kind folks would recommend.

Thanks.