If you look at your record type in the CloudKit Dashboard and open the Metadata Index drop-down field, you will see that none of them are searchable. Until yesterday they were. This morning I noticed this because I could no longer sort by createDate using:
[NSSortDescriptor(key: "creationDate", ascending: false)]
, CloudKit, .
, . , CloudKit 0 .
update: , . , . creatorUserRecordID . , , . . , : https://github.com/evermeer/EVCloudKitDao