Filling the empty production date

HI Young_G_Han,

You can summarize raw table records and use crossjoin with a calendar date to create the expanding table, then you can use raw table field values to filter the result table records which are not included in the ranges.

CROSSJOIN function (DAX) - DAX | Microsoft Docs

NewTable =
SELECTCOLUMNS (
    FILTER (
        CROSSJOIN (
            SUMMARIZE (
                Table,
                [Product],
                "Start", MIN ( Table[Date] ),
                "End", MAX ( Table[Date] )
            ),
            Calendar
        ),
        [Date] >= [Start]
            && [Date] <= [End]
    ),
    "Date", [Date],
    "Product", [Product],
    "Qty", 1
)

Regards,

Xiaoxin Sheng