PCSX2 has released an alpha Qt build and " for now it's only available on Windows 10 and above, no Linux or Mac executables yet". Given the direction of PCSX2, Ryujinx, Dolphin, I doubt legacy support is a priority. Whether it will still work on Win7 or earlier will depend on whether it's Qt 5 (still works) or Qt6 (dropped support for 7) Qt 6.3-based, no Windows 7 support. (unless someone figures out a fix for Qt6).
EDIT: There's an unofficial build by one of the devs that uses Qt 6.2, which is compatible with Win8, and should be compatible with Win7
Keep an eye on any notable Qt projects you care about, as it's likely they will soon drop Win7 support by moving to Qt6. Example: MultiMC Minecraft launcher (though it has legacy reasons for staying on old versions of Qt), UltimMC, PolyMC (both based off MultiMC)