Yes, UC can follow the Reconciliation Process and if within 90 days the parties decide to live together they can. In short Islamically they are divorced but according to this MFLO 1961 they are not divorced until the expiration of 90 days. But after 90 days it will be in effect if the Husband has full filled THREE main requirements:Nice Post and in very detailed. But question will remain the same... if 3 talaaq are given at once then why these UC are following Ronciliation process OR they are following some other Divorce Islamic Rules?? and IRCC also following those rules too?
1. Pronouncement of Talaaq
2. Service of the notice on the Chairman (in which the wife is residing)
3. Service of a copy of the notice on the wife.
If he has full filled these requirements, he is eligible to have UC and Nadra Divorce Certificates.
But for immigration purpose, I would say one MUST go through Notice Procedure as well for the safe side.