HI,
I had made the editable gallery as like you but I followed Reza Durrani video
https://www.youtube.com/watch?v=wI6SHGQ9ATg
But I am unable to patch few combo box in SP list as that column is a single line text in sp and in powerapps its a combo box which have items coming from Dynamics table.
I am unable to write a patch statement for this column.
Gallery:

EMBDEC Combo
Items: ReleaseProdcuts (Dynamics Table) , Items (Value): 'Item Number'
DefaultSelectedItems: Table({Result: ThisItem.EMBDecorID}) (its shows as Table)
I am not able to patch the selected 'item number' in SP in a single text field

@eka24 @RandyHayes @StalinPonnusamy
Please help!!!