Yes, it looks like this research is continuing : https://www.sciencedirect.com/science/article/abs/pii/S037887411831763X
As with all things medical/scientific, I fear it may have temporarily taken a back seat to Covid research. But since antibiotic-resistant TB is a huge issue world-wide, I expect to see it resumed as a great and inexpensive enhancement to antibiotic therapy. People with NTM should benefit too.
Sue