One "fudge" to prevent the DV lists from being active when you don't want them to be is to force an error in the Source.
Consider a Named Range called MyList that is the source for a DV list in B1.
I can modify the Source formula for the List as so:
the above is simply an example that states where A1 is 0 the DV List should not populate
(though the arrow appears in B1 I can't select anything until A1 is modified)
Above is just to demo a basic premise - ie you can control as and when the DV lists are "active" (per se)
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