This current wave moves from the east to the west. In fact, Germany has probably peaked, we have 4 days in a row of declining number of infections. France is at the beginning of the next wave, their number of today's infections is approaching German numbers.
Note that German infrastructure is at its limits in terms of how many tests can be done or whether the health office can track down the people a known covid case has been in contact with. Due to the sheer size of the wave, the percentage of unknown covid cases has increased.
I'm not so sure how valid the argument about test capacity limits and underreporting is. While laboratories for PCR tests might be above capacity the 2G+ requirement (recovered or vaccinated AND tested) must have increased quick antigen tests dramatically, which also get registered and positive tests reported. E.g. to enter a public pool I had to get tested and they had a test tent right next to the entrance. The week before I could just enter with my vaccination certificate. Many people have to get tested more extensively now for work or travel. So I would be very surprised if the test coverage hasn't actually increased and declining numbers with more tests certainly looks like a good sign.
source: https://www.worldometers.info/coronavirus/country/france/