New to TaoBao. Need advice with Preorder Genshin Impact merch

I just found out that Genshin has a TaoBao store front which provides official Genshin merch at a much lower price than sellers in the US. (my poor wallet) The whole order consists of preorder items that have release dates ranging from mid October to early December.

If anyone has experience with multiple preorder items from Genshin TaoBao, do they wait till everything in one order is released before sending the items to the TaoBao warehouse or do they send them individually as they are released?

If they send the items individually, is it worth to paying the warehouse fees until everything arrives? I know people have experienced MiyHoyo shipping out new items 1-2 months after initially release times.

Should I wait until everything is released before ordering? I'm also nervous about them running out of inventory or having a limited run of certain items. I don't know much it's my first time using TaoBao and ordering from Genshin, so any additional information would be helpful!