I think any reconstruction of a dinosaur where there is just a skull as a refence point will be taken with a fairly large pinch of salt. However, many dinosaurs look fairly similar to other dinosaurs that we do have more complete fossils as reference, so they’ll end up being based on those as well.
Flock of Flamingoes Shaped Like a Flamingo (lemmy.world)
Hammerhead skull (lemmy.world)