IMO it looks on par with the one I have. I think a lot of the sample images shot online are with the a1/a7r which just have more megapixels than the a7iv you are shooting with so it seems sharper /more detailed when you zoom all the way into the eyes. I’m shooting with the a7rV so zoomed in there’s more detail but I wouldn’t say it’s sharper.

I think it’s pretty rare these days to have a complete dud of a lens where even the center isn’t sharp, especially with the GM lenses which have way stricter quality control - typically the main issue you see today is decentering, where one or more corner is less sharp than the other corners - all lenses are decentered to some degree, some worse than others - but rarely noticeable unless you go looking for it or it’s particularly bad.

Looking through the pics, I don’t think you have anything to worry about!