only for the hope of peace
Don't be a fool. They gave up their nukes for money.
The United States said it would vote against aid to Ukraine in the IMF and World Bank, and in general would be very displeased if Ukraine did not play along. No one wanted a nuclear Ukraine. Ukrainian leaders themselves had no idea what to do with these nukes, but they had millions of pensioners going hungry, and factories about to go bankrupt.
The giving up of nukes not only unlocked aid, but also rid Ukraine of a huge expense.
Leaving aside all the arguments about how Ukraine would never be able to maintain them, operate them, or prepare specialists for various crucial production aspects.
Ukraine gave them up because it had no other choice, and because it had no need for them. Even now - if they had them - and they used them... they would lose the entire world's support, and Russia would obliterate their country. By keeping it conventional, they are now about to do a deal where they keep a completely radiation free 80%.
Don't become a believer in the myth of the Ukrainian atom bomb.