Element API -- getting table data from a matrix
The table field contains an array of all columns, I don't really see where you problem is since you could just do data[0].flavorText[0].text in your template and as you already explained you can see the direct output so you can just address the index in the array.

$block-&gt;flavorText[0]-&gt;text 


will return you the text within the first column

In order to get the values from all columns you'll have to loop through them

$values = [];
foreach($block-&gt;flavorText as $column){
    $values[] = $column['text'];
}