

What CPU do you have? Have you enabled hardware accelerated virtualization in the BIOS? Did you do any tweaking when running the VM? I had a Windows 10 VM on a 2013 laptop, so what you are describing might just be bad configuration.
Enabling virtualization in the BIOS is required for usable performance. Tweaks are optional but I highly recommend them because out of the box Windows VM feels pretty sluggish mainly because of bad graphics configuration. For that I use Quickemu which is a script that automatically sets up your VM for optimal performance. (Works for MacOS VMs too but I have not tried it) Finally you can try debloating your Windows 10 installation with Chris Titus’ Winutil, which btw also includes some useful Windows tools like a GUI for package manager.
It does not matter how powerful the phone is as long as the drivers suck. The original Pinephone would have been fine if it had proper standby mode. If this makes it to production, it’s going to be ewaste. Judging by the fact that they don’t mention software challenges and only focus on privacy/foss buzzwords and le epic HW specs.