Cannot assign a Non-Worker as manager to Workers

Summary:

I have created a non-worker in order to be able to give a manager to the top managers so that they can be in the workforce compensation plan. However, when i type their name or person number i can't find them

Content (required):

Hello experts,

I have created this non worker:

Yet when I try to assign him as the manager of a person that started on the 01/01/2022, his name doesn't appear in the search:

Has anyone face this issue before? If yes what is the solution?

Thanks in advance,

Juliette

Version (include the version you are using, if applicable):