His wife went back home pakistan since jan 2018. And still there but now husband knows from some sources that his wife got 2nd marriage without filing divorce here in canada. And she filed the KHULLA (Divorce) in pakistan. In canada the both parties status is married and not file the divorce.
Out of curiosity:
Do the authorities/courts in Pakistan not have to serve the divorce petition on the husband who lives abroad? This would otherwise incorrectly seem like ex parté proceedings.
To my knowledge, a divorce obtained abroad must be legally valid in Canada as well. One of the conditions is that the person applying for a divorce in the country abroad should have been staying in that country for one year before starting the divorce proceedings.... for the courts of that country to have the jurisdiction to hear the merits of the divorce matter.
In this case, your friend's wife moved to Pakistan in January 2018 i.e. she does not meet the requirements for this divorce to be legally valid in Canada.... and further for her to sponsor a new husband. It could seem like she has committed bigamy.
I would recommend your friend seeks legal advice on this matter + he could file a counter-divorce case in Canada if required