Filling balance for missing days

Anonymous Create a new table as below and use this table for your Matrix visual

Test267Out = UNION(
                    SELECTCOLUMNS(
                                    EXCEPT(
                                            CROSSJOIN(VALUES(Test267MatrixBlankZero[Date]),VALUES(Test267MatrixBlankZero[SKU]))
                                           ,SELECTCOLUMNS(Test267MatrixBlankZero,"Date",[Date],"SKU",[SKU])
                                          )
                                 ,"Date",[Date],"SKU",[SKU],"Qty",0
                                 )
                  ,Test267MatrixBlankZero
                    )

Here is the screenshot of both actual (using the source table) and expected (using the above new calculated table)

Anonymous  Please add an another column to the new table that was created as above

NewQty = 
VAR _PrevDate = CALCULATE(MAX([Date]),FILTER(Test267Out,Test267Out[SKU]=EARLIER(Test267Out[SKU]) && Test267Out[Date]<EARLIER(Test267Out[Date]) && Test267Out[Qty] <> 0))
VAR _Lkp = LOOKUPVALUE(Test267Out[Qty],Test267Out[SKU],Test267Out[SKU],Test267Out[Date],_PrevDate)
RETURN IF(ISBLANK(_Lkp),Test267Out[Qty],_Lkp)