If the neem and soap mixture got on to that particular leaf then I would say, yes, it could be the cause. The other leaves on the plant look very healthy - are there any others that are turning color like the one in the images? If not, I suspect the plant will be okay but keep an eye out for any others starting to change color which could be an indication of a nutrient deficiency or even over-fertilizing. Have you fed this plant recently?
Did any of the soap and neem mix get onto the fig plant? almost 9 years ago.
Yes i spraid some on the leaves and stem as well because of the spider mits almost 9 years ago.