DeutscheBahn is showing the same schedule options for August 23 as they are for earlier in the summer, e.g. departing at 7:40, 10:05, or 10:39, with two connections by non reserved regional and/or EuroCity trains. DB generally shows all published schedules.
Most other web sites only show schedules for tickets they currently have for sale, usually 3-4 months out for SNCF. I’d wait another week or two to check oui.sncf, since it’s not yet 4 months from departure. The other tickets that SNCF has for sale on August 23 are for connections that partly require reservations, which is likely to be a key difference.