Developments like this occur every few years and goes nowhere.
If they wanted to create a cure, they could have a long time ago.
Look at this articule from 2015. There are other similar articles.
https://www.wehi.edu.au/news/cancer-drug-shows-promise-cure-hepatitis-b#:~:text=Australian%20scientists%20have%20found%20a,the%20infection%20in%20preclinical%20models.