Probation Period

Not clear, what exactly do you want to ask?

Vague query without relevant information, however, your probation period is incomplete (after extension) which is valid and within rules, and nothing wrong/illegal.

You have pointed to delay of 5 months.

It is duty of bosses to initiate the process of appraisal per internal rules in time.

The employer must have appraised you and let you  know of the reasons for extention.

Employee should also not remain silent after completion of probation period, if no orders are issued by the management in time.

Did employer or bosses conduct any appraisal and signed with you?

Do you have a copy?

Did you represent in office?

Either clear probation period successfully or you may have to face consequences of having not cleared probation period.