Will I ever be able to get the Peach Blossom earrings again?

[Xieveral]

I hope we're able to obtain the Princess Edyva doll in some way as well.

Just as in the Valentione stuff, the earrings will most likely be available via the Cash shop when it's closer. They have a maintenance plan around the event that can be seen with the Eternal bonding stuff so they may use that opportunity to slip in the event and the cash shop items.

The seasonal items were available for purchase well before the event started, that's been the case with every event since ASW. Little Ladies' Day is just a few days away with nothing up for purchase. However, the Mog Station seems to be undergoing maintenance as of this posting so let's hope they're putting in the earrings from last year.