The question is, why are you trying to get the value using what you posted.
Here’s an explanation of
[field_5492be0701cb6] // field key of recipe_sections
[1] // row 1
[field_5492be5d01cb8] // field key of section_steps
[0] // row 0
[field_5492c04b01cbb] // field key of step_ingredients
[0] // row 0
[field_5492c13601cbf] // field key of quantity
You can convert the field key to the field name this way
$field = get_field_object($field_key);
$field_name = $field['name'];
Your field has 4 levels, a repeater or flex field, two nested repeaters or flex fields and whatever quantity is. ACF creates meta keys for repeaters like this:
"{$field_name}_{$row}_{$field_name}_{$row}_{$field_name}_{$row}_{$field_name}"
