Parents and child objects?

Question

C++ / C#

Everything is very simple, I have a parent and one child object in it
, the task is for the parent to move after the child object

* And no, swapping them will not work

Answer 1

Push the child object into the main object in the list of objects by pulling the child into it.

Answer 2

If without physics, then at the start, or when you need it there, you can take the spatial offset of the parent from the child and move the parent when moving in the update, only with the parent it will move in the same way and this needs to be compensated. If with physics, then you just do a fixedjoint and move it as you like