With treating your hep b it is likely you will not progress further and could experience improvement to F1 or even F0
Fibroscan results range from 2.5 kPa to 75 kPa. Between 90–95% of healthy people without liver disease will have a liver scarring measurement less then 7.0 kPa (median is 5.3 kPa).
Just for perspective, your score of 8.1 is only slightly above what a healthy person with zero liver disease would have.
“ Liver fibrosis is the final result of most types of chronic liver injury. Most habits and events that injure the liver will lead to a fibrotic liver. ... There is clear evidence, based on findings from repeat biopsy, that mild to moderate fibrosis is reversible.”
It took me 17 years to go from no stage to stage 4. Do what ever you can to reverse your condition.
I would assume it is different for everyone
Try to find what is causing it and try to fix it
It is not a nice feeling in stage 4 with all the other health conditions that you get later in life.