jurajt - thanks for the interest in the NEO hub. In addition to the good options Adam Levithan has pointed out, 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-availability-roll-out-to/ba-p/1524768
The new Microsoft Lists home page and associated eight ready-made templates will begin roll out by end of July 2020, first to Targeted Release customers and then to the broader production environment – inclusive of enterprise, education, and government plans. The Lists app in Microsoft Teams will begin roll out by the end of August 2020. All are expected to be complete in production worldwide by the end of October 2020.
Hope that helps.