Imagine you have a table with 6 columns in the middle of a page. How could you set the first row so that it remains fixed, and only the rows below moves up and down?
You can add a bloc with one column and set it fixed and below add a regular bloc with the amount of columns you want and offset the first as the width of the fixed column.
You could also use custom interactions to set a value to the fixed position so then it became scrollable.