There seems to be no further information available yet. Here is a link to the original article from 2024:
https://www.sciencedirect.com/science/article/pii/S0924857924001961#abs0001
Given your husband's dire situation, perhaps you or his doctor would like to contact one of the authors to inquire about current status. If you look at the list of authors, those whose email addresses are available are indicated by a small envelop icon next to their names.

You may also want to do some research about whether there is any news about phage therapy, especially for what is called "compassionate use", that is as a last resort.

Best wishes to both of you, he sure is a fighter!