Father Gallagher was conditionally ordained in Ireland by Bishop Faure last year. You can ask him yourself.
Yes many priests try to keep it hush hush. This was the practice of the Society.
But in our internet age it is hard to keep these things quiet.
I think it’s a mistake to keep this quiet. We, the laity need to have certainty about the sacraments. If there is a cloud over the orders of a priest, many will refrain from going to him, until the doubts are resolved.
Many Catholics have real doubts about the new Holy Order rites given by Paul VI. For myself, I won’t go to priests ordained through this rite or ordained by bishops who have been consecrated through this rite.
I see why they do it, since they fear the Conciliar Church authorities, but what’s more important?