Cumulative calculation does not show months/weeks without imput

Hi milson4 

Thank you for reaching out to Microsoft Fabric Community.

please try below DAX it may helps you.

IssuedReportsCumulated = 
VAR MaxDate = MAX('DateTable'[IssuedDate])
VAR LastReportDate = 
    CALCULATE(
        MAX('Reports'[IssuedDate]),
        'Reports'[IssuedDate] <= MaxDate,
        ALL('DateTable')
    )
RETURN
CALCULATE(
    [IssuedReports],
    FILTER(
        ALL('DateTable'),
        'DateTable'[IssuedDate] <= LastReportDate
    )
)

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Thank you.

Hi milson4 

May I ask if you have resolved this issue? If so, please mark the helpful reply and accept it as the solution. This will be helpful for other community members who have similar problems to solve it faster.

Thank you.