Proposed resolution:

This wording is relative to N5008.

1. Modify [unord.map.overview] as indicated:

   -4- The types `iterator`, and `const_iterator`, `local_iterator`, and `const_local_iterator` meet the constexpr iterator requirements ([iterator.requirements.general]).

2. Modify [unord.multimap.overview] as indicated:

   -4- The types `iterator`, and `const_iterator`, `local_iterator`, and `const_local_iterator` meet the constexpr iterator requirements ([iterator.requirements.general]).

3. Modify [unord.set.overview] as indicated:

   -4- The types `iterator`, and `const_iterator`, `local_iterator`, and `const_local_iterator` meet the constexpr iterator requirements ([iterator.requirements.general]).

4. Modify [unord.multiset.overview] as indicated:

   -4- The types `iterator`, and `const_iterator`, `local_iterator`, and `const_local_iterator` meet the constexpr iterator requirements ([iterator.requirements.general]).

The intent of P3372R3 was for all container iterators to be constexpr iterators, but during application of the paper to the working draft it was observed that unordered containers don't say it for their local iterators.