I'm not aware of a direct option to selectively aware ignore specific columns during a bacpac restore. 2 options I can think of:

Option 1

• restore the db to a temporary db in azure or sql server
• use a script to create a new db without the varbinary column and copy the data from the temporary db to the new one.

-- Create a new database
CREATE DATABASE NewDatabase;
GO

-- Switch to the new database
USE NewDatabase;
GO

-- Create the schema and table without the varbinary column
CREATE SCHEMA YourSchema;
GO

CREATE TABLE YourSchema.YourTable (
    Column1 DataType1,
    Column2 DataType2,
    --...
    -- Exclude the varbinary column
    --...
    ColumnN DataTypeN
);
GO

-- Insert data from the temporary database to the new one (excluding the varbinary column)
INSERT INTO YourSchema.YourTable (
    Column1, Column2, /*...,*/ ColumnN
)
SELECT
    Column1, Column2, /*...,*/ ColumnN
FROM
    TempDatabase.YourSchema.YourTable;
GO

Option 2

• If it's too large to restore at all with the varbinary I'd try to create a copy of the original db without the varbinary and export the bacpac file