Trump has stated he will cut American aid to Ukraine, which makes a majority of total aid. Recently Zelensky stated that if Ukraine’s only hope for sovereignty is its own nuclear arsenal, they will build it.
It will surely help significantly preventing a tactical nuclear strike from russia, though it won’t end the war. It is an absolute last resort trigger. Ukraine will be annihilated after they use it (Russia has way more nuklear weapons).
So somewhat good for them and OK to do so, though no solution and no substitution for western military aid.