I don't think the new account means anything at all. If you have a regular account that you use in the fediverse then you would dox yourself by posting a project you've been working on.
vibe-coding tools make the thrill of development accessible to more people - more people are making apps.
I think of it similarly to someone posting gen AI "art" in an art community. It's a low effort post that I'm not going to engage with or be interested in.
piefed has a nice feature whereby new users have a starburst icon next to their username.