There is a niffty Boot manager called Refined. This is what I use even though I installed Windows after Linux and had many kernel panics, but it does the job well since it scans your boot drive every time you Power on your machine. Here is a link. Just download the CD-ROM version, put it in ventoy, boot from it, and the rest is easy. You already are a linux user, you can figure it out.
I also advise you to disable Windows updates if you can, and I mean all updates, because they can mess the boot order. If you use Windows to play games and games only.
Edit: You can also install it from your distro package manager if you can access your system.