Bug fix - extension array with 2d datetime64
- [x] closes #38390
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

> does this change user visible formatting or just with the internal formatters?
@jreback Hi code changes with the internal formatters
 Hi, I am still stuck in the PR. Need more time.  @jbrockmendel ok here?

@weikhor if you can merge master will take another look today or tomorrow Hi It is difficult for me to answer questions provided. I need more time.  I close this since I stuck this for long time. I get simpler task. Thank for review.