As long as they were created within DAZ and the rules of this thread/forum I don't see why you can't post here to ask for advice/critiques.
I would however suggest that you keep it to as minimal amount of posts as possible by either putting most of the images into a spoiler so people who don't want to cycle through all those images don't have to, or not posting all 30 at once and limiting it to maybe 5 or so a day.
Though, critiques on composition, lighting, quality are one thing, asking for critiques towards renders for a VN are another in my opinion, so you may get opposing answers most of the time if people do end up engaging with your posts.