Thank you for your question and patience, Joel. Descriptions of this variety indicate that their mature height is 8-10 feet tall, so yours may be on steroids.  More likely, a fertilizer high in nitrogen (the first number on the label, like 10-10-10).  The higher the nitrogen, the more leaves and less fruit.  Here is a description of columnar varieties, generally:  https://extension.unl.edu/statewide/cass/Columnar%20Apples%20-Growing%20Fruits%20in%20the%20Small%20Home%20Orchard.pdf
As for fruiting, the typical causes of little to no fruit are over application of nitrogen, little to no pruning and/or a lack of a compatible pollinizer nearby.  Pruning opens up the tree's foliage so sun reaches the leaves to increase photosynthesis, necessary for flower and fruit production.  A compatible pollinizer means another variety of the apple species that produces pollen that is needed for pollination.  Crabapples are good trees to plant nearby for this task.  https://extension.psu.edu/orchard-pollination-pollinizers-pollinators-and-weather
I suggest that you trad the following Extension publication to get an idea of the most effective ways to achieve these goals:  https://catalog.extension.oregonstate.edu/ec819
I hope this helps.  Good luck!