Dual-boot Pop_OS! and Windows 11
systemd-boot is the boot-loader for Pop!_ OS since 18.04, and that doesn’t recognize Windows. The easiest fix is to switch to grub. Here are the steps, assuming you have installed in UEFI mode. Installs grub and os-prober, and then runs os-prober and update-grub, in that order.
sudo apt install grub-efi-amd64 grub2-common os-prober
Assuming os-prober had listed Windows, and update-grub outputs the Linux kernel images and Windows entries, you should be good to go. Rest of the steps are optional.
If you have a high-res laptop screen and the grub boot selection screen is too small, you could edit /etc/default/grub file using your favorite editor. I’d recommend taking a backup first.
sudo cp /etc/default/grub /etc/default/grub.bkp
Make the following edits to the file. Rest of the config can stay as is. Please note that you can choose the resolution, based on what’s supported on your computer. 640x480 is the safest bet.
Update grub again:
Please try this at your own risk. I’m not an expert on boot loaders.