Not a wrapper, it seems: $ file /sbin/ifconfig /sbin/ifconfig: ELF 64-bit LSB sh...

Not a wrapper, it seems:

    $ file /sbin/ifconfig 
    /sbin/ifconfig: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=6bf40c44a9b42715a7670365936e6d0aa16f7bf1, stripped
    $ dpkg -S /sbin/ifconfig
    net-tools: /sbin/ifconfig

And my man page does not show anything about it being obsolete (Debian buster).