I really wanted to give this a legitimate try but even following the installation instructions to the letter, it bricked my Windows install and I had to spend a few hours fixing the MBR, Bootloader, etc. I'm sure it would be a breeze using a separate physical drive but that'll be a project for another day.
Bazzite does look very promising and happy to see innovation in the Linux gaming world!
Bazzite has a command, `ujust setup-boot-windows-steam`, which when run adds an entry to Steam-in-Bazzite that causes a Windows boot.
It also has a command `ujust regenerate-grub` which adds a Windows entry to the bootloader.
Each of these is a single command which only must be run one time after install. I suppose it could take a few hours to either do it by hand, or to discover one of these options, but they are both documented and in particular the guide at https://docs.bazzite.gg/General/Installation_Guide/dual_boot... (which you implied you followed) mentions the latter command.
It works on each of my Bazzite machines without any manual tinkering/intervention. Not sure why it would not Work On Your Machine (TM).
Those get taken down, with the motivation that they’re reviewing the seller, not the product, and should be on the seller’s page instead (where no one reads them).
I got sick 4 times in 2019 and am normally sickly for about 90 days a year. Sick 0 times since Feb 2020 and almost no "feeling shitty" days. The major change was hand washing, face masks, no bars, no gym, no movie theaters, and no travel.
Bazzite does look very promising and happy to see innovation in the Linux gaming world!