There are usually two problems and companies almost always work on the wrong one first.
The first is the material. Most companies have a deck, a one-pager and something that gets called a battlecard. It was built by marketing, it looks professional, and it is built for the brand rather than for the conversation. Talk to the reps about it, or better, talk to the buyers, and the gaps are obvious inside ten minutes. Not because marketing did a bad job. Because they were solving a different problem.
The second is fluency, and it is the one that decides deals. A rep who has to go away and check has already lost the room, even if they come back with a perfect answer two days later. Buyers read hesitation as risk, and they are not wrong to.
You can see a deck. You cannot see the eleven seconds where a rep did not have an answer, unless you were in the call.
The reason the first problem gets the attention is that it is visible.