Landon is currently away from Mystic Falls on a critical mission — tracking down his mom, making his journey at least for the next little while similar to Caroline’s activities taking place offscreen.
Assumedly since we aren’t going to be seeing the meeting, a portion of Landon’s story will continue to unravel offscreen.
As for when exactly Legacies viewers can expect to see Landon again, Julie Plec said he would not be seen right away but didn’t get into big specifics.