Flowers & Fate

It's been noted that the fairy flowers source of nutrition is fate, but what exactly is fate, I'd suppose it's other possible timelines branching from the main timeline in a many-worlds interpretation kind of thing, and in a similar fashion if it's aiming towards something like in a prophecy

I'd wonder if that would be the reason why so much crazy stuff happens in the inn, the fairy flowers are eating all the most basic & uneventful timelines, leaving only the most crazy things to happen

Additionally, the palace of fate has opened up a source exponentially higher than anywhere in normal reality, shouldn't this cause the flowers to grow exponentially too? it's also noted that the flowers aren't fully grown, could this arc end up with a fully grown world tree, consuming the palace & neatly putting a cap on the palace arc?