Yes, but only for the poorest. And I think only they need it.
It ends up being functionally the same, with the possible exception of how often the money is dispersed.
A UBI and a negative income tax can end with the exact same amount of net money dispersed to anyone, it just requires tweaking the income brackets and rates.
Okay so why not focus on negative income taxes then? If they are functionally equivalent and governments already have experience with them why not do away with UBI?