Hoping to identify the type of plant as well as an apparent disease that causes the leaves to grow somewhat sparsely and misshapen. Photos attached. Thank you!
Your plant is called a Ficus Lyrata (Fiddle Leaf Fig). Here are a few things that might be causing the problems.
It is getting sparse probably because it isn’t getting enough light. All sides of this plant need very bright indirect light in order to stay full and bushy. You may have to move your Fiddle Leaf to different locations in your office as the seasons change so that it always has enough light. If there is not enough light, you can get small brown spots on the older growth. This would go along with the sparse misshapen leaf problem.
Small brown spots may be the sign of a plant disease such as Leaf Spot disease caused by a bacteria that has infected the plant. These spots are usually lighter in color, often surrounded by a yellow halo, and generally appear on the newer leaves. The leaves may turn yellow and eventually fall off. As with all fungal and bacterial diseases, better air circulation, well-drained soil, dry leaves, bright indirect light, and less water help control bacterial diseases on plants. Never mist a plant if leaf spot disease is suspected. You can use a commercial Fungicide or the homemade remedy of putting a tablespoon or two of baking soda and a teaspoon or two of mineral oil in a spray bottle of water. Shake the solution well and then spray all areas of the plant that are infected. Keep infected plants away from your other houseplants.
If your brown spots have gray edges, it is probably a fungal disease called Anthronose or Leaf Blight: remove the diseased leaves, try to keep water off of the healthy leaves, and increase the air circulation around the plant. You can read all of my care tips for a Ficus lyrata in the Popular Houseplant section of the website.
These plants are considered poisonous and should be kept away from pets and children. The sap of a Fiddle Leaf Fig Plant is very irritating so use gloves when working with this plant. Read more about common houseplants that are poisonous in Don’t Feed Me To Your Cat! A Guide to Poisonous Houseplants.