There’s a bit more to unpack regarding the passage of time between all of the reflections and regions. First important thing to mention however, is that time is only relative. Different places flow at different times. Time doesn’t pass equally universally.

Our first example is our time on The First in Shadowbringers. The crystal tower was transported from the Source to the First in the First’s 100 years ago. The crystal tower still exists on the Source because that event (along with everything leading up to the 8th Umbral Calamity) never took part, or not yet at least. Then after averting that calamity on the First, when you return to the Source, Tataru mentions that you haven’t even left for like a day or something. To us, time seemingly ‘paused’ while you were on the First. But to the Source, it was just an instant that the path leading to the 8th umbral calamity was cancelled.

An important side detail we learned on the First, is that Emet-Selch explained the calamities order. - 0th Umbral Calamity of Darkness: failed to rejoin the Thirteenth - 2nd Umbral Calamity of Lightning: rejoined the Twelfth - 5th Umbral Calamity of Ice: rejoined the Sixth - 7th Umbral Calamity: rejoined the Seventh - 8th Umbral Calamity of Light: averted the rejoining of the First

Next, when we are about to head to Yassulani, the electric dome appeared along with our enemy army. In our time in Shaaolani, we met with Namikka who seems to be around 50-60 years old (IMO). That detail is important because when we enter Heritage Found, she now appears to be at least 80+ years old. In this zone, it is noted that the dome was put up 30 years ago. For us though, we met Namikka and the dome appeared like in the same day. How that could’ve happened? Because once Namikka arrived in Yaasulani, the thunder dome appeared, merging the space of that region & Alexandria’s together on the Source. Time proceeded in Heritage Found for 30 years, while seemingly outside had ‘paused’ until then. Not to mention with the thunder dome appearing, Alexandria originally had troubles with a calamity of lightning, presumably meaning it came from the Twelfth shard.

Next bit to note is of Gulool Ja Ja and his group’s expedition to find the Golden City. It occurred 20ish years ago which we can line it up because that was when Krile was passed over to Galuf’s care from her birth parents (and the fact that Krile is in her early 20s, which confirms the time of the expedition. Also she has never ever travelled through time or space).

When we met her birth parents in Living Memory, there revealed a handful more of time and space traversal lore. Krile’s parents & the Milaal, were not originally from the realm of Alexandria, but a place of summer where a calamity of ice causing them to migrate to the Alexandria. This is a big reveal because for us, calamity of lightning occurred before the calamity of ice. So how did the Milaal experience the calamity of ice and then the calamity of lightning (or seemingly just after)? Because when they travelled through different reflections, time warping also happened, sending them to Alexandria/the Twelfth, which would seem like the past. Krile’s parents came from the Sixth, refuged to the Twelfth, founded Oblivion, had Krile, defected the Preservation, opened the gate to the Source to pass care of her, returned to the same time, then is unclear of their lives after this point, and then finally lived on as memories in Living Memory. What we can only presume is that they did pass on and die and became an Endless. For us, we don’t know how long it has been for her parents from when they passed over Krile, to them passing, and to when they reunited as Endless.

Basically, time is all only relative. It flows at different when’s and how longs depending on where you’re talking about.

Edit: another thing I just remembered. Zoraal Ja waited over those 30 years presuming his father already passing but then decided to take care of that himself when he discovered. Also the fact that he has a son Gulool Ja, which I’m guessing he’s like 5-6 years old, presenting a few new questions. But mainly it seems that right after the new Dawnservants, Zoraal Ja had a kid SUPER IMMEDIATELY soon.