Yes - World Tree, or mountain, or tent/yurt pole, something that becomes the axis mundi - the literal axis around which the (non-physical, and also, physical) universe rotates, is a key feature of amost all shamanic practices documented by Michael Harner, the originator of core shamanism.
You use this to locate yourself into the various realms, both the three trad. realms of CS (Upper, Lower, & Middle worlds) and also there are other possibilities, once you become accustomed to the method. It’s basically about creating a reliable stable interface to enter non-physical worlds, and it has the advantage of being used by many other people, so there’s a power to it in its own right by now.
Harner used the World Tree symbol to devise a system of core shamanism, meaning, the techniques that create the core of global shamanic practice, BUT stripped (for the most part) of culturally specific aspects, so there’s no issue of “cultural appropriation” of any one indigenous peoples’ spirits, or symbolism, etc. - he noticed what was identical about the techniques, underlying the symbols and objects that were located only in that region.
CS uses drumming to drive trance, which is more related to the Siberian & Asian methods afaik, because the entheogens (plant spirit helpers) used in some locations run into tedious legal barriers, and also issues of supply, lack of trained people (like the ayahuesceros of South America) in urban locations around the world to guide people using them correctly.
I think that was a good choice, it also makes this possibly the safest method to directly contact spirits, since it’s neither very powerful TO BEGIN WITH nor thrusts someone radically outside their normal mental and emotional state. To begin with!
Now, I typed out a tutorial (just PM’d you valkarath) which I’ve sent to a few people on here - the only reasons I haven’t posted it publicly are 1. any tutorial generates ongoing questions by new members who find it, which is fine, but I can’t always commit the time to give them the attention they deserve, and 2. the people I did some training with, the Foundation for Shamanic Studies, had some kind of weird copyright, although this is taught openly by other teachers, but I’m not sure where the line’s drawn so I’m keeping this to PM for now.