I don't know, the end scene in The Marvels with Kamala meeting Kate seemed like a way to propel those characters forward.
That's not propelling their story forward, it's just having them meet.
And even if the intent behind things like Sharon continuing her role as the Power Broker even after being pardoned and let back into the US, Jake Lockley killing Harrow, G'iah joining MI6, Kamala introducing herself to Kate, and Riri making a deal with Mephisto was in fact to 'plant seeds', the fact that said 'seeds' were 'planted' doesn't mean that they actually have to - or were ever planned to - 'take root'.
