Oh, I’ve done messes like this… I had a machine whose UEFI had like five things on it. This doesn’t solve it all, but I really like refind for taking care of whacky multi boot scenarios. Just install it and it scans all the drives in a system for OSes and gives you a menu on startup.
There are various VM solutions out there to handle running one-off windows programs, by the way. I have a copy of Win11 inside a Proxmox VM that runs those few times I need desktop Office for something specific. I’m sure others will come in with better solutions, but those are the ones I’ve used.

I have an original framework. I swapped the RAM and SSD in seconds. The add-on ports make changing functions trivial. I swap my HDMI to a wired Ethernet port on the regular, and the expansion cards actually work through a dock, too. I really like it. It does throw the odd “USB port has malfunctioned” error from time to time, but it’s quite rare.