Is the money spent on an individual who has not yet been appointed, despite having a job in the private sector, considered his rightful due, given that he has not yet been appointed to a government position?

The decisive factor is the awarding entity, so it should be consulted and inquired from whether it stipulates for the entitlement of the wages it provides that a person must be unemployed from any work, even if it is private, or if it pays to those who have not obtained government employment and private work does not affect it.