I don’t think it is that widely available due to Snapdragon chips not supporting some feature it requires.
Good option for Pixel owners or phones with MediaTek chips though.
I run LineageOS on both a Pixel 3a XL and a OnePlus 5. Yes, these both run Snapdragons.
The option to install the subsystem is present on both, but I have not attempted it.
I have loaded it onto a Pixel 6a running Graphene.
Apparently it's about software, not hardware - Qualcomm recommends running Android under a virtual machine (which lacks nested virtualization support).