I wish that was correct but the retiring age is 65 per our constitution:They have retirement ages, probably 60 is the retirement age for a judge. So no extension of term.
179. Retiring Age-
A judge of the Supreme Court shall hold office until he attains the age of sixty five years, unless he sooner resigns or is removed from office in accordance with the Constitution."
[Chapter 2: The Supreme Court of Pakistan] of [Part VII: The Judicature]