the answerhub is a community tool and its not really something that is actively supported/staffed by Epic. there are on occasion times where staff will comment or provide answers but its main function is meant to be the community helping each other. there are ways to get more direct assistance from epic but it would require getting a actual partner license from what i can tell.
if your questions aren’t being answered then theres probably a reason, either they aren’t well explained, they get lost in the sea of questions, or maybe the people that are on don’t know either. personally ive never asked a question here before ive always gone and figured things out on my own. if theres something i dont know then its probably been asked about before or something similar has been asked. its probably not worth it for epic to hire someone to answer questions, in my experience i end up answering the same things an a regular basis. many people just want things done for them as well which can be quite frustrating.
as for all the old yet relevant questions, i generally dont work on any question that has been inactive for several days because in many cases the person who asked has forgotten about the question, found a solution, or just wont respond. so its hard to work on questions that get no input from the asker. again many of these questions are also duplicates so with a bit more searching the answer can be found.
I realize this doesnt really help or answer your question, but we are getting to work in professional grade software for free, if official support cant really be provided thats fine with me. for anyone looking to get into the game dev field for work unreal engine is a great resource to be able to use and once they are working for a proper studio then they will get the official support that they may need, in the mean time their education should fill the gaps.
Note these are my opinions and i do not work for epic. also im a hobbyist not a professional