I would think that Lenovo would have the only valid answer for that question. All we can provide is anecdotal responses since we are users and not involved as a group in those decisions.
Before one of us could answer we would have to
purchase the device (with or without fedora)
install fedora on it (if not pre-installed)
report the status here
New devices can seldom be expected to come preinstalled with fedora linux unless the manufacturer has worked with fedora in developing the hardware and made certain all the new hardware works with drivers already developed and installed.
BTW, that video can only be watched by going to youtube.
I don’t have this model but I have a P14 gen1 and my coworker has an L14 gen2. We are both running Fedora on it with Ryzen and my battery life has been excellent. I can get through a workday under normal usage on a single charge. Once I plugged a usb-c monitor into my dock and the laptop ended up powering the monitor in addition to its own display instead of charging itself and did so for several hours before I even noticed it wasn’t charging. I’m not familiar the difference in internals between the Z and P/L models (which are very similar), but if it’s close, you’re probably going to be happy with it.