This link confirms that Jack Smith and John L Smith are indeed the same person and also explains his time in The Netherlands.

Also noted is that his wife, Katy Chevigny, is

a documentary film maker known for the 2020 documentary, Becoming, about Michelle Obama.

The article also confirms the couple has a daughter, and states both that he has returned from The Netherlands, and is still in The Netherlands.

https://en.wikipedia.org/wiki/Jack_Smith_(lawyer)