Go across the tree bridge, and you should see a Shade on the other side. There is a Jackal nestled in a crook on the other side, so feel free to use an overcharged shot and then melee it.

Once they're gone, keep moving until you reach a sort of ramp made of a large tree root. Shoot each one with an overcharged shot, and melee them (to save Pistol ammo). The Jackals tend to stay back, so use your Plasma Pistol against them. The Grunts are dumb enough to charge straight at you, so switch to your Human Pistol and kill them with a headshot or smack them in the face. There is a small group of Grunts and Jackals (about six in total). Move ahead and you should see another downed covenant dropship, the Brilliant Gift. There is a path leading up towards the ramp right up the Pelican Hill, there you would get an Active Camo, but it's practically useless unless you like to ambush some Grunts. On the other hand, those Plasma Pistols are fully charged. A little up ahead, you will find a couple of dead Covenant with two Plasma Pistols and one Needler.

Move down the path through the big puddle. In addition, if you are not on Easy the time when you will actually get the shotgun is much later in the level. Fill up with the ammo, on Easy you will always acquire a Shotgun, but in Normal and higher difficulties, Bungie has removed it so just fill up the ammo and continue. This is a lot vaguer place than any level in all the rest of the Halo series, keep your calm, nothing will attack you, just keep track on your motion tracker, use your flashlight sparingly.

M41 rocket launcher (Only can be pickable if player stalls around extraction point more than 10 minutes when killing Combat Form, usually wielded by Combat Form Human).

Halo 6 walkthrough