It is more challenging IRL I think, with varied body types, which aren’t really in the inspo photos ( not dissing inspo per se, of course). And maybe how one defines “ tunic”. Some of the looks above might be considered ” longer tops” which now LOOK longer due to the ubiquitous shorter and cropped tops.
As a somewhat a pear- shaped person, with narrower shoulders, a challenge in even regular tops is finding cuts that slide over hips without sizing up so much that the top is sloppy, and also avoid too strong of an A-line or “ babydoll” shape. Tunics make that harder. So practically, because I was also not much of a leggings person either, I didn’t do much tunic styling. A few times I had some really warm leggings and cozy fleece tunic styles I was quite happy with the look and feel but mostly indoor because of running cold- natured.
The fuller the pants style, the more volume the tunic or even longer top has to slide over. Or the pants need to be specially chosen for tunic- friendly— minimal tailoring, side- zip, thin fabrics( as opposed to folks who can just grab a pair of regular pants & toss a tunic over).
So I think that works if it’s a look you really like to wear a lot, to choose both components carefully to work together, specific “trending” bottoms plus a specific cut of tunic.