I'm using the PnP Search Results Web Part (v4) and I've enabled query rules to make use of promoted links also. I'm trying to enable stemming in both the search results and the promoted links, or at the very least, just the promoted links. I don't see any such options within the web part settings or in the 'Manage Query Rules' settings. I've added to modify the query rules by adding an asterisk as a wildcard in the keywords, but this stops the promoted links from showing altogether. I also tried adding it as a wildcard to the query within the Promoted Result Block and Ranked Result Block, which also didn't work.
Is stemming possible in SPO / the Search Results web part, and how can it be enabled? The only documentation I can find on it, is only valid for all other versions of SharePoint, but not SP Online.