Ben Lockwood - this was not the purpose of the use case, however it is doable with the new Microsoft List.
With the new Microsoft Lists recently launched you will be able to have managers create individual onboarding checklists that they share with specific new hires. In this scenario each new hire would have their own unique onboarding checklist that they can mark as complete so it would not interfere with other new hires who will have their own checklist. Microsoft Lists will ship with a number of different list templates, including a new hire onboarding checklist so managers will have a list template to start with that they can tailor and assign to specific new hires.
Read more about the release of Microsoft Lists here - https://techcommunity.microsoft.com/t5/microsoft-365-blog/microsoft-lists-begins-general-availabilit...