Can a natural person be a party to a collective agreement and can a legal person be a party to an employment contract?

Explain and motivate with legal space.

Comment on the statement below and justify your answer:

"A probationary period can always be extended."

After being examined as a paralegal, Pekul enters working life both proudly and happily. The first job will be an 8-month full-time temporary position on one of the larger dragons in private legal advice in connection with deaths, ie. a chain of funeral homes.