I have been watching flights into LH & LX hubs. Sofar in May and June all flights have been operated as in the schedule announced some 4-5 prior to the beginning of each month.
For July SFO-FRA is up to daily from 3x/week, with EWR & IAD-FRA holding up too. Service to Switzerland is to relaunch with IAD-ZRH on 6-July.
Cargo might contribute to make the pax flights worthwhile, due to much higher airfreight rates these days; the cargo flights ORD-ZRH seem to stay on as well.