The topic title is not so far off, it is indeed possible to measure the impedance of an antenna or other network with a multimeter.
But you need 3 of them and RF detector probes, google for impedance measurement 3 Voltmeter methode, this is from the time before impedance bridges and impedance ( RF-IV) meters, vector voltmeters and VNAs. ( if I remember well it can also be done with 3 current meters)
I never tried it, but it is still on the to do list. But there are more ( forgotten) ways to to IV impedance measurements, like using a double ballanced mixer and voltmeters.