wormholes are possible if we can bend space and play with gravity
in theory its just an advanced step of them both combined
I think the main issue is maintaining them, I read most physicist deem it impossible because we can't think of an energy source to stop from collapsing it
That is, if a wormhole doesn't end up squishing/stretching everything that tries to go through it like a black hole.
But a wormhole is sort of a "tunnel" between two black holes linked together at two different points. Even if an artificial one were to be planned for creation far into the future, there's always the problem of a wormhole being a massive, massive safety hazard for anything that tries to go into it.
Wormholes are a separate thing. A stable wormhole would not act like a blackhole, it would just be a hole in space where things can go in and out
A blackhole sucks everything into it's singularity, even light hence why it's black. Nobody knows what's inside one since information just goes in, not out.
There's no evidence that black holes are wormholes as far as we know all black holes in our galaxy just suck things in, not spit them out.