Yeah, the "80% nuclear power" figure is only for electricity and dates back from record figures reached back around 2005–2010; nowadays, nuclear power accounts for approximately 69% of France's electricity mix and 41% of the total energy mix as your source states.

Other reasons not mentioned for the lower inflation are that the government has imposed a freeze of natural gas prices until December 31st, 2022, and put in place rebates on gas (petrol) prices from April 1st onwards in order to contain the increase in gas prices: initially 18 cents by litre, then 30, now 10 until December 31st.

Many people like me, who aren't homeowners and use public transport exclusively, have barely been affected so far, only the increases in food prices have been felt by everyone. However all those measures and the increased borrowing rates for government bonds (OAT) are putting a significant strain on public finances and the Government debt.