Building new gas power plants for backup is currently the plan the Germany is implementing for it's future renewables powered electric grid.
https://biz.liga.net/en/energy/news/germany-to-build-11-gw-i...
In mean time, it looks like coal in Germany will used for longer.
https://www.cleanenergywire.org/news/german-regulator-says-n...
Germany has not learned anything from the war in Ukraine and still think that dependence on gas imports from other countries is fine even for backup.