Ok, got it working now, was a bit confusing to to figure it out...
In View Mode Setting > Shooting > ONLY 1. option (Eye sensor) and 4. option (VF+EyeSensor-VF only+Sensor) result in the desired VF image playback function.
My View Mode Setting > Playback - was set to > Eye Sensor - This has no impact on that function, very unlogic in my opinion.
Any way, problem solved, thanks again 👍
For what it is worth (HTH):
I use focus peaking quite a bit, with the highlights in white.
I use the joystick to move the focus box to where I would normally use for auto focus, then push in the rear command dial. This zooms in, filling the evf or lcd with only the part of the image that is inside that focus box area. My X-T30 has two levels of zoom, rotate the rear command dial to swap between them, usually I just leave it at the maximum zoomed in level, but normal usage seems to kick this between the two settings (the size of the focus box tells you at a glance which level you are in). Pushing the rear command dial again takes you back to regular full screen viewing.
Once zoomed in, rotating the focus ring in the lens will move the focus in or out of course, but after a short time the white pixels from the highlights will start dancing to show you where the focus is. As you slowly, repeat slowly, did I mention slowly?, rotate the ring, the dancing pixels will either disappear or more of them will appear. As you sweep back and forth, find where the most dancing pixels are and take the shot. If there are not any or very few dancing pixels, you are probably not in focus.
I use the white - highlights menu setting mostly for the usual type of contrast in the scenes I find because their dancing pattern catches my vision quickly, but the other colors and lows vs highs also work for differing contrast scenery.
