Hi,
I create SharePoint list and its Newform is customized by using PowerApps. There is a lookup field and I want to sort order.

@HCP旅行手配依頼書 is column name and 企画イベント名 is lookup column.
Ex: My Lookup data dropdown list will appear like this.
20211023_XXX
20211110_XXX
20211127_XXX
20211205_XXX
20220115_XXX
But I want to sort it like this.
20220115_XXX
20211205_XXX
20211127_XXX
20211110_XXX
20211023_XXX
Any help or guidance would be greatly appreciated.
Thank you.