Styling Excel without using model

[dinacuatro]

The data of the excel file I generate do not come from a specific model, so I chose generating it directly:

return (new \Illuminate\Support\Collection($data))->downloadExcel(
    'informe.xlsx',
    null,
    false
);

($data is a two-dimensional array with data of the unique data-sheet)

I wonder if there is any way to apply some style on columns (width, font-weight, etc.).
As far as I see it is possible ( like explained here) if I create a model for this excel.
Is it possible without?

[patrickbrouwers]

You have to create an export class if you want to apply custom styles