Hi Will,
thanks for your reply. The plant is indoors and sitting right next to a large window. However, there are a lot of trees in the backyard that block direct sunlight. There is another Fiddle Leaf Fig plant in the next door room facing the same window direction that is doing fine and developing new leafes, so I would assume light conditions are not the issue.
I water it once or twice a week when the soil feels dry. It has not been repotted recently.
I use 10-10-4 fertilizer plant spikes every 2 momths.
Btw, the plant just dropped another new leaf.