To identify products with no sale in DAX we can use the ISBLANK function.

Here is a sample

EVALUATE
FILTER (
    SUMMARIZE (
        'Product',
        'Product'[Product Name],
        "Sales", 'Internet Sales'[Internet Total Sales]
    ),
    ISBLANK ( 'Internet Sales'[Internet Total Sales] ) = TRUE
)

And if you want the products with sale you can switch “TRUE” with “FALSE”

EVALUATE
FILTER (
    SUMMARIZE (
        'Product',
        'Product'[Product Name],
        "Sales", 'Internet Sales'[Internet Total Sales]
    ),
    ISBLANK ( 'Internet Sales'[Internet Total Sales] ) = FALSE
)