You're not supposed to be able to reveal every possible area of the map the first time you go there; it's a Metroidvania, you often need to come back later with more upgrades to be able to fully explore.
It sounds like you've reached the Summit already, if you've unlocked the ability to view CGs; you need to explore more there and find some upgrades. If you really want explicit information on where to go, then starting from the beginning of the Summit: you need to head through the indoors area after the platforms at the beginning of the Summit, then once you come out of the other end of that building, head upward as far as possible (which requires going through a building, heading right, and dropping down onto an area just above an save point), then follow the path until you get the Wire Shot upgrade. Then use the Wire Shot to explore further.
Like I mentioned before, it's helpful to check your map and see where you didn't finish a room or go through a door - while it's true that often you can't fill them in without future upgrades, the correct path will always be in one of those spots. None of the critical paths in Crisis Point are "hidden" in the way certain metroidvanias hide them, so the map is an invaluable tool for finding your way forward.
You can also leave custom map notes on each square of the map, so in cases like the one you're talking about where vines/ivy are blocking the path, you can leave a note there saying "vine/ivy blocking the exit" or something to that effect, so you can easily remember what was there later on without having to actually go there