Originally Posted by
TURIN
The article is from May, 2020 and only discusses temporary conversion to a freighter, although it does discuss a permanent supplemental type rating. From the article:
“Anyone who opts for Lufthansa Technik’s exceptional solution now can easily switch to the permanent [supplementary type certification] solution later.”........Jochmann says the change involves “much more than just taking out seats”, because of the different load and safety considerations involved in placing freight in the passenger cabin.
This is not a conversion to a freight aircraft, it's a convenience conversion to allow some freight to be carried after passenger traffic volumes crashed. tdracer gave a pretty thorough analysis in this thread of what would have to be done to make the aircraft into a useful freighter and why it (probably) isn't justified.