The Star Wars Jedi Survivor friendly creature is encountered as soon as you reach Koboh. Initially a signpost it eventually becomes a rumor side mission you can follow, but only when you have a certain ability. If you're trying to do anything before then you won't get far.
You'll need a very specific option from the list of Star Wars Jedi Survivor abilities, Force powers and gear that will be obvious once you have it, but you'll know nothing until then. The fact you unlock what you need somewhere else entirely in Star Wars Jedi Survivor can also be confusing if you don't immediately make the connection.
Obviously there's a mild spoiler ahead about the power you need for the Jedi Survivor friendly creature, but nothing big.
What is the Star Wars Jedi Survivor friendly creature?
The friendly creature in Jedi Survivor is one of the first things you encounter when you arrive on Koboh. When you first use the BD-Visor to get a closer look at the landscape ahead of you, you won't be able to miss the massive, dinosaur-like creature ahead you'll need to reach. When you arrive you'll trigger a cutscene and be able to move past, but the 'friendly creature' will remain visible on your holomap, glowing, to show a section of the map you'll be able to explore eventually.
However, you won't be able to do anything until you've unlocked the Force Confuse ability and its extension Confusion: Major Fauna, which lets you use it on animals. It lets you control nearby creatures and, initially, lets you eventually tame rideable creatures you can use. You'll unlock the ability during the Forest Array mission on Koboh via a Force essence upgrade found just before you see a red, rhino-like creature surrounded by stormtroopers. At this point you’ll be prompted to use your new ability on the creature and unlock the power to control animals.
Once you've unlocked this Force Confuse ability and can tame creatures, head back to the Star Wars Jedi Survivor friendly creature - the easiest way is to fast-travel to the Gorge Crash Site (or Derelict Dam after unlocking Force Lift/Slam) - and use the ability by pressing R1 + Circle/RB + B when the creature is highlighted. It'll bend its head down, allowing you to climb up the vines on one of its tusks. From there, you'll be able to access a section of the map with some puzzles to complete and chests to open.
Nearby, you'll also encounter the Star Wars Jedi Survivor Pit Droid, who you can help with the Force Lift ability.