The executive branch can't repeal laws, they can choose to selectively enforce them. Also, the previous administration via the state department, was working on

The executive branch can't repeal laws, they can choose to selectively enforce them. Also, the previous administration via the state department, was working on unwinding the many agreements we have with other countries on marijuana legalization, it's hardly tenable to legalize it at a federal level while we're still giving (let's call it slush) money to governments who make it illegal, and punishing those who don't. This administration has castrated the state department, so near as I can tell, none of that effort is happening anymore. And in fact any government paying attention would refuse to take such moves seriously now that the AG is reversing the prior administration's efforts thus far.