With static binaries that is not needed (and you can use OS=_any in the extension release file to mark them compatible).
If you want to repackage distro binaries without recompilation, you can have a look here: https://github.com/flatcar/sysext-bakery/pull/74
There are two tools, one can bundle the needed libs in a separate folder, and the other one works more like Flatpak and uses a full chroot. Since you already know what files are needed at runtime I think you could try the first approach, otherwise the second might be easier.
Comments
With static binaries that is not needed (and you can use OS=_any in the extension release file to mark them compatible).
If you want to repackage distro binaries without recompilation, you can have a look here: https://github.com/flatcar/sysext-bakery/pull/74 There are two tools, one can bundle the needed libs in a separate folder, and the other one works more like Flatpak and uses a full chroot. Since you already know what files are needed at runtime I think you could try the first approach, otherwise the second might be easier.