The problem with automatic updates for Pi-Hole at a remote location is when Pi-Hole behavior changes with an update. As an example, when Pi-Hole 4.0 was released, the default blocking mode changed from IP to NULL. Many users wondered where their blocking page went. In V4.1, the query log now shows PTR, SOA and other types of requests (previously was A and AAAA only), and this has caused a number of questions.
For a parental installation, I would use the new version at home for a while, then decide whether it should be upgraded at the parent home. If you do update it there, you may have to make some configuration changes or explain something to them.