Depends if what you call a "kit" is the collection swabs, transport media, PPE for collection staff, skilled collector, or the lab reagents, lab staff, etc.
No denying any of these items may be produced in China or affected by Covid travel disruptions, but again, if the spread of the virus is slowed, then the rate of consumption of these items (and the entire health system) is better able to cope.
Fortunately testing providers don't panic buy collection swabs like people at my local Woolies buy toilet paper
