jorisvandenbossche commented on PR #38321:
URL: https://github.com/apache/arrow/pull/38321#issuecomment-1767945494
So it seems that pandas doesn't preserve the unit in the DatetimeArray
constructor:
```
In [4]: arr = np.array([1, 2, 3], dtype="datetime64[s]")
In [5]: dtype = pd.DatetimeTZDtype("s", tz="Europe/Brussels")
In [6]: pd.arrays.DatetimeArray(arr, dtype)
Out[6]:
<DatetimeArray>
['1970-01-01 01:00:01+01:00', '1970-01-01 01:00:02+01:00',
'1970-01-01 01:00:03+01:00']
Length: 3, dtype: datetime64[ns, Europe/Brussels]
```
This seems fixed on the last pandas release 2.1, so will have to keep the
older code using internals for the older pandas versions.
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