The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at You Know, That Thing Where.
In real life, I remember hearing that all eels (at least of some species) are born in the same place despite ranging lots of oceans when they grow up.
I think I understand what you’re looking for, but the closest I can find is The Lifestream.
There's also how Digimon are all born from eggs from the Village of Beginnings
Some religions may also have a concept of "pre-birth realm"
Is there a trope for a certain location where members of a specific race are born and resurrected?
Example: In the gacha game Eversoul, the titular Souls are a magical humanoid race that are Made of Magic, and as such do not reproduce or experience mortality like humans. They're all "born" or "reawaken" near the World Tree found within the Fayren Union, one of the world's seven nations, making them a bonafide Truce Zone that no country, powerful or otherwise, can ever intrude upon or antagonize.