In Germany the problem is coal (lignite): it remains a huge social and political 'asset'. Many jobs, low-priced electricity, no dependency towards fuel shipped by a foreign nation...

France switched to nuclear because at the time it didn't have any fossil fuel ( https://sites.google.com/view/electricitedefrance/messmer-pl... ), while Germany (especially the then-RDA part of it, Soviet-controlled) had huge reserves.

Phasing-out coal is therefore difficult for Germany, however it does so and the acceleration after Fukushima (2011) and during its nuclear phase-out is impressive: https://ourworldindata.org/grapher/share-electricity-coal?ta...

France & Germany (beware: check the scales...): https://ourworldindata.org/grapher/electricity-generation-fr...

After Fukushima most German citizens didn't want nuclear reactors anymore: Which political parties switched most of the nuclear plants off since Fukushima? CDU/CSU: 14 FDP: 11 SPD: 9 Greens: 3 (source: https://x.com/HannoKlausmeier/status/1784158942823690561 )