Just sharing some of my thoughts here …
One thing that seems to (mostly) present in your renders is black/dark background. I understand that you use it to make the character stands out to get more focus, but you could also feature a somewhat brighter background. Especially if the character’s traits are happy or fun etc. like the squirrel, this helps to emphasize the characteristics (featuring it in daylight scene would be a great alternative too). Even if it’s a horror genre, you can add a bit of glow or gradient on the background behind the character to make it more interesting. This video contains some tips on it.
Like mentioned in the feedback, you could also a a turntable animation (‘360 video’). Showing the bones/rig (control rig would look better, if possible) would add more to it. When presenting, remember to show only the model without UI clutters from the software/Blender (crop the image so it doesn’t show the gizmo/buttons etc.). Grouping several images together is a good idea too for example the views from front, side, and back in one large image. Overlaying the wireframe over the clay or workbench render can look better too. I think this artwork can be a good example.
About the ‘required gamestyle’, I think they refers to following certain style of a game or IP or studio. For example, Blizzard (and some other studios) has hand-painted style on their stylized models and characters, meanwhile other companies/studios prefer realistic one or maybe a mix, so if you aim to get into then you have to adapt your style to their preferences. Btw, as an alternate path, you could also be spesifically a modeler only, or maybe more of a sculptor, which involves little to no animation work.
This one is just my personal preference, but if you polish the character more, you can try to put it on the marketplaces. See the best selling models there and study the presentation and content (the visuals, what included in it, etc.). If you can get some free ones that would be a great source for learning (some artists might have free models available). It might not be an overnight success, as does many things, but you have the opportunity to get some income while waiting, and you might also learn something yourself in the process. There are also chances to get commission from customers that saw or bought your products, though not always. In short, you can widen your presence rather than merely relying on a portfolio.
Speaking of which, if you have made a portfolio on a site (Artstation, etc.) would be great to put the link on your account, like here or Discord for example, so people who are interested can check on your portfolio directly when seeing your art.
Sorry for the long text and keep up the great works ! 