This is makeindex, version 2.16 [TeX Live 2022] (kpathsea + Thai support).
Scanning style file ./python.ist.......done (7 attributes redefined, 0 ignored).
Scanning input file wideeventobservabilityprototypereport.idx....done (51 entries accepted, 0 rejected).
Sorting entries....done (324 comparisons).
Generating output file wideeventobservabilityprototypereport.ind....done (115 lines written, 0 warnings).
Output written in wideeventobservabilityprototypereport.ind.
Transcript written in wideeventobservabilityprototypereport.ilg.