nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqaym5tkx0r5guu64wauw0e65fptrhuk7d0j5alx3ky90rvddaefwq42fq8m (nprofile…fq8m) What tool did you use to interpret the PROJ files?
I had some trouble defining the string in QGIS when I tried to do effectively the same thing: https://dorotac.eu/posts/flat_earth/
Where did you get the info that the format is deprecated? I can't quickly find any confirmation.