This is very basic Child door lock - to protect doors from access. I would say it would work till your child is 2 years old... later they know how to unscrew.

For us, this is so far working fine.

This was printed in PETG - so it very strong and resistant.

Of course, there is a place for improvement - I think one part should be with lock - just press lock - which is more convenient in a kitchen. Especially when it is necessary to open doors more often than once. But... this was done, set printed and there is no more time to fix or add this modified part. Maybe in future...