If there are plants (there is a patent and a paper describing this in some algae, IDK if it has been replicated or not...) that have preferences (kinetic isotope effect!) for one isotope of uranium over the other you could technically have a uranium enrichment plant made from uranium enrichment...plants.
"By following the fractionation of 233U, 235U, 236U and 238U during the enzymatic reduction of hexavalent U to tetravalent U by the bacterium Shewanella oneidensis, we provide the first direct evidence of the nuclear field shift effect during biologically controlled kinetic isotope fractionation."
It's not like you can just buy some uranium to experiment with in your home lab, so even if a normie had this idea they would probably not be able to test it in any way.
You actually can. Small quantities of natural or depleted uranium have no special nuclear regulations associated with them in the United States and can be shipped like other moderately toxic metals.
Theres 4.5 billion tons of the stuff in seawater. Enough uranium to make 70 billion little boy bombs if my math is right, using an algae perhaps you’ve designed to accumulate uranium.
