https://archlinux.org/packages/extra/x86_64/qt6-5compat/
Arch Linux - qt6-5compat 6.11.0-1 (x86_64)
arch linux
https://packages.debian.org/bookworm/qt6-5compat-dev
Debian -- Details of package qt6-5compat-dev in bookworm
Qt 6 Qt5Compat - development files
debiandetailspackagedevbookworm