I fail to grasp what you want. We already have such reactors and these are functional, some are no longer functional but were built in the past. There are also plans to build more: https://en.wikipedia.org/wiki/Breeder_reactor
Instead of building new nuclear reactorsy taking decades, we couod use the same money and research better storage tech, better gris tech, make industrail demand more flexible and sponsor heat pumps for domestic heating. Just a thought.
It is not about failed attempts (there were numerous, for sure) not vague plans. This is about an existing solution, and therefore an existing model of breeder reactor ready for deployment. If you cannot name one, well, there is no solution here.
They lift most of the dependency towards uranium providers (needing way less of it), and considerably helps tackling the nuclear waste challenge (producing way less of waste, and less hot).
The challenge is technical: obtaining a satisfying industrial (big, predictable, not too expensive...) breeder isn't a solved problem.