this seems like an issue from our side that during the build the styles were not copied over. Normally, we ship all CSL styles available. We are investigating this issue already and hope to resolve it asap.
@annalog I need some more information on this. Where did you download the app? Which OS are you on? I tried the portable versions of JabRef 5.9 and 5.10 for Windows from Releases · JabRef/jabref · GitHub and all show fine.
In case the version you show is build from source directly (without using our GitHub actions build script), the CSL files are not included. Maybe, you checked out the source and did “./gradlew run”? In case you want to have all CSL files available in the development version too, “just” copy over eveything from “buildres/csl” to “src/main/resources”
I can confirm @Anna’s observation: the problem is with the MacOS version of jabref. The full set of csl preview options appears on Linux and Windows versions of jabref, but not MacOS.