The United States bombed poppy fields and laboratories in 2017; not sure what the current state of production is, but if the Taliban regains power, it's possible they will destroy much of what remains.
https://www.upi.com/Top_News/World-News/2017/11/20/US-Afghan-aircraft-target-Talibans-poppy-facilities/9081511195920/
I think much of the current supply comes from Mexico.