Using the Sansung Galaxy s9 series,
There are reports in this forum that enabling this feature brick the phone when rebooting :
Custom binary blocked by OEM Lock after parental control turn off
Samsung S9: Custom binary blocked by OEM lock - what about the files?
An issue is already open in the Gitlab :
Galaxy s9 + Parental Control --> normal boot sequence broken : Custom binary blocked by OEM Lock. (#8190) · Issues · e / Backlog · GitLab