If you don’t want to bother with the bootloader like the other comment mentioned you can also just use the boot menu from the motherboard instead. You gotta mash f11 (or whatever it is on your motherboard) on boot when you want to go into Windows, but if you only need it every once in a while it is good enough.
Dual booting < having two separate SSD’s
They still need to share an EFI partition
If you don’t want to bother with the bootloader like the other comment mentioned you can also just use the boot menu from the motherboard instead. You gotta mash f11 (or whatever it is on your motherboard) on boot when you want to go into Windows, but if you only need it every once in a while it is good enough.