https://www.leevalley.com/en-ca/shop/hardware/outdoor-hardware/gate-and-fence/latches/74567-ozco-gate-latch?item=01S1525

You've got the cheapest of the cheap latch set there, that's sort of sub optimal because the wee latch bar bears all of the slam when it closes.

Get something like this, a way better design that addresses all the wee one's shortcomings.