Sure, NCIS didn’t give us an on-screen Tiva reunion, but at least it gave us a note on where the characters are and may have left a door open for them to return someday when the time is right.
That’s quite a conclusion to an arc that revealed the character had been lying low and went through hell and back in her mission.
She’s with her longtime love interest, her daughter, and apparently her father-in-law in Paris, and all is well with the world.