Meanwhile, the question of "what is canon for roleplay" is very different to asking what the canon version of the WoL's adventures are. If your character isn't the WoL then should any of that have happened to you? Or are you someone else on the edges on the story, in which case the canon you need to know is (a) events that affect you-the-non-WoL, and (b) world lore about how things work and what people can do.

It's canon that the WoL can teleport across the rift because they were personally pulled there by the Exarch and have now established aetheryte attunements that allow them to travel back and forth at will.

It's technically canon that the same could be repeated for someone else, assuming they could handle the vast travel distances (the WoL is unusually strong in this aspect) but you'd need a very good excuse to get there. The Exarch's summoning method is underpinned by exceptional circumstances and he's unlikely to be pulling random adventurers across.

If you can come up with a way to get your character there, great. But it's not something that anybody can just do.

Ultimately yes, you can make up whatever you like that appeals - but the point of sticking to canon rules about how the world works is to keep everyone on the same page so you can build your ideas from the same basic concepts. Some people will care about that more than others.