Finding the Fates is only passable after credits roll as part of the epilogue story. Like in Hades1, you need to build up your relationships with 5-6 specific characters (none of the olympic family), including Prometheus. After that, the Fates challenge you to use Moros's Pin how they want to.

Are you okay with mild spoilers?

To anyone who may have doubted (there were a lot on that other platform), this is directly from Alyson’s IG story 🙇🏻‍♂️

Wretched Broker is your friend in this case if you just keep on trading. Then again, judging by how only 8,5% of Steam players have ever made it to that point, I suppose the epilogue isn't all that important in regards to the lead-up to Hades 2 lmao. You should be fine shortly after credits roll.

Just need a ton of nectar and ambrosia (and patience lol)

You need to get to her 10 times to get to the credits, and then there's an epilogue. For that, you need to max out your relationships with the Olympian relatives.