No I don't want to make a bootable USB already have a Ventoy USB drive for that. in Windows With Rufus or win to USB you can install an Windows iso as "Windows To Go" to a external drive (can be a thumb drive or better an SSD) and then boot from that drive and have functioning Windows installation on it which is also kinda portable too
Use private space instead of a second profile it is as secure and private but with less hassle. also you have to enable send notifications to current user in user settings and allow the second profile to run in background.
Edit: this video explains private space in GrapheneOS very well
I'm using one of these for a long time and since I need port-forwarding there seem to be only 3 options and thanks to your data I realized I still made the right choice and gonna keep using this one for forseeable future
Yes I will update the grub for ease of use but first I need to get windows to boot when I choose it in BIOS boot menu