By looking at the deck plans, there is a good possibility. Although the numbering of cabins on the Joy differs, she is a sister ship to Bliss, Encore and Escape.
On the deck plans for the Bliss, the balcony cabins in those same positions are 8138/8738. There is a good youtube video for Bliss 8138 that shows an angled balcony large enough for loungers. Looks like a great deal for a BF cabin😎