I think that was my comment? The connection at the phone end is Micro USB. USB-C has MHL support - actually it does (just not the Sony Xperia XZ, which I have) - here's one at JB https://www.jbhifi.com.au/computers-tablets/accessories/moshi/moshi-usb-c-to-hdmi-adapter/961109/.
I bought this one at Officeworks - https://www.officeworks.com.au/shop/officeworks/p/comsol-universal-mhl-cable-comhlun015
I plugged the adaptor into my old Samsung Galaxy Note 3 on Friday night and it worked fine for the Hawthorn/Geelong game.