[romanhn]

First off, this is a rough time to be applying for jobs - recruiters and hiring managers are inundated with applications. It's a game of numbers these days, so half a dozen applications is just not a meaningful amount when every posting gets tons of well-qualified (and overqualified) candidates.

Second, I suspect the lack of a LinkedIn profile is much more likely to impact your chances compared to a GitHub profile. The latter has never been a particularly strong signal for hiring managers for reasons described elsewhere in comments here. Missing a LinkedIn page makes you stand out - and not in a positive way. Between the "overemployed" crowd and AI-generated profiles, there's something to be said for having some kind of social proof that you are who you say you are. Whether that's right or wrong is beside the point, just part of modern reality.

That said, your best bet is to just apply more. Looking for a job can be a truly full-time job in itself these days.