You mean tap to focus or that joke from that video?
There's no magic button at all, AF system either. From older Panasonic technology, much harder to succeed.
But, if touch to focus will be reliable without hunting, for sure, we can set the GH5 AF system under certain circumstances at convenience and make it shine when necessary.
BTW, you have a GH5 unit with you. Do you mind to test it? Please, not the fastest settings like MY, OK? You have no need to keep previous tests reliab