I would retrieve the value of a field of the first row, like this:
rows[0].field_name..
but the 'array is too large and kint breaks.
You can look up the structure of the view result in your question Get result view with formatter programmattically. (there was no feedback, did it work?)
If you want to use this in twig, it would look like this:
{{ view.field.field_name.value(view.result[0]) }}