Honestly I'm sort of surprised that there isn't training about this given how much sales training people go through. Presentation is HUGE. A good mic, a proper camera, and even just minor consideration for lighting make anyone so much more credible, and pleasant to talk to.
It's not that surprising, it's fairly technical and many don't want to deal with it (ask anyone if they know what XLR or phantom power is), another problem is there's so many different options that it often leads to choice paralysis and some people feel uncomfortable to ask for money to buy better equipment.
Myself and my team are all technical sales folks with engineering backgrounds, and we naturally optimize for this sort of thing — all of us have some form of “advanced” setup that’s been informed by each other’s investment.
On the other side, NONE of our account reps have anything remotely close. I can think of one or two times in the past few years when someone asked me about what tech I use. My company even has a home office budget benefit meant for exactly this sort of thing!