did you mean to add a pic or two???

More light = more side sprouts. If it's growing outdoors, then good! If it's indoors, then you may just have to settle for a leggy plant.

How long has your tree been in the pot it's in now?

Your best back-budding response, by far, will come from a well-timed pruning of a healthy tree, and the best time to prune is either here or is fast approaching (if you live in the Northern Hemisphere.

The partially formed branches you can see/feel in leaf axils (crotch formed by leaf stem and branch) and/or above leaf/bundle scars are repressed by a growth regulator/hormone (auxin) synthesized primarily in the branch apex, where extension growth takes place near the tip of the branch.

This is a ficus branch started as a cutting. By removing the apical meristem at the tip of the branch (note the stub as witness to it having been removed), I eliminated the source of the chemical that represses lateral growth, sometimes called side shoots. The new growth in leaf axils are new branches. Had I NOT pruned the tip of the branch off, the cutting would have continued to elongate indefinitely and the lateral breaks might never have occurred.

You can force lateral branching, and even decide where that branching will occur, by pruning strategically. More light very often does cause some lateral breaks here and there, but there is no guarantee insofar as where they will occur or even if they will occur. If your F elastica is healthy, you can be almost certain it will back-bud from 2-5 or more nodes immediately proximal to any pruning cuts that eliminate an apex. The most enthusiastic response will come from trees fertilized at luxury levels and moved outdoors into dappled or open shade several weeks before the pruning.

Provide some images of your plant and I'll help you prune it to ensure it grows shrubby instead of tree-like.

Al

Now it's the right time to prune hard, repot, summer solstice is coming...
My elastica started 6 years ago, with 5 leafs!
Great experience & knowledge based advice received here, Al my Elastica says thank you!

Thanks for the kind words; and, strong work on the tree!

Remember to remove the mature leaf when the first leaf on a new branch appears in its axil.

As soon as the first leaf on these (2) new branches in axils of mature leaves begin to open, the mature leaf should be removed. This helps decrease leaf size and shortens internodes for a fuller and more compact tree.

Al