Had another look online at PGM'S12 May 2021 14:45
Hope this is of relevant interest and also mentions the six metals in the group :
PGMs are most often used as catalysts because of their chemical stability, but they are not limited to this role. According to the International Platinum Group Metals Association (IPA), one-quarter of all goods manufactured either contain a PGM or had a PGM play a key role in its production.
Some examples of end-use applications include: as catalysts for the petroleum industry (palladium and platinum), in pacemakers and other medical implants (iridium and platinum), as a stain for fingerprints and DNA (osmium), in the production of nitric acid (rhodium), and in chemicals, such as cleaning liquids, adhesives, and paints (ruthenium).
LOR