People who have children to fill a “void” end up disappointed. They grow up, they move away, they either resent how little they had or how much they had given to them and what it has done or not done for their fledging careers.
I have three. No regrets, but I didn’t do it to give my life meaning. They are their own people and I am responsible for giving my life meaning, no one else.
At some point, you are back with yourself and own thoughts. This is neither good nor bad. It simply is.