Hi sorry to necro this, came upon this post randomly when striving through search results.
You were initially about 5'4 and went to 5'8. Your arms obviously reflect the wingspan of a 5'4 person (as you have stated in an older post).
I will add a few things which you may take into consideration or not.
1) The picture gives off the illusion of short arms because you wear a long shirt and wide baggyish pants.
2) You did not stunt your forearm or hand growth as it is within normal proportions to your upper arm and original height. (Also, why and how could "malnutrition" stunt SOLELY forearm growth - makes no sense. Only birth defects / injuries during childhood would do that).
bro just train your forearms and it won't be a problem
3) OP is a female so this advice is stupid. In general, if you want your arms to appear longer, lose weight, make them slim.
4) You can't reasonably lengthen the forearm. The median nerve twists through the ulnar and radius, it will inevitably be damaged when messing around with the forearm. You would permanently lose pronation/supination movement. No reasonable doctor would do this for cosmetic purposes. People with accidentally broken forearms often suffer the permanent effect of reduced functionality. Lengthening the metacarpal bones - forget it. This is only done when someone's hand/finger is literally mangled.
In terms of AL the only thing you could possibly do is humerus - which in itself is not worth it as even there the ulnar nerve literally lays upon a craving in the bone and often gets compressed leading to necessary nerve decompression surgeries (huge scars etc). Also, I would not want to risk a loss of sensation/functionality in arms/hands for that. It is factually not worth it. And I know this sucks but it is the sad reality of our anatomy.
In conclusion,
The best thing you can do is to lose weight and appear slimmer, I would not think your wingspan is a problem so leave it be. AL is for daredevils.
Regardless, this should probably not be noticeable irl. Even if it is, it is the price we all have to pay when we do LL