If anyone is interested, I made some modifications last month to get TempleOS running on the x86_64 JSLinux: https://ring0.holyc.xyz/
Wow, thanks for this, this is exactly what v86 was missing!
Runs faster than my demo: https://zb3.me/qemu-wasm-test/jspi-noffi/
Even though it has no JIT. Truly magic :)