On 17 August 2003, Bychok took his religious vows, and on 3 May 2005 he was ordained a priest in the Ukrainian Catholic Archeparchy of Lviv.

[3] Following his ordination, Bychok spent time as a missionary at the Mother of Perpetual Help Church in Prokopyevsk, Russia.

He later served as the superior of Saint Joseph's Redemptorists Monastery and pastor of the Mother Parish of Perpetual Help in Ivano-Frankivsk, Ukraine.

[4] On 7 June 2020, the feast of Pentecost in the Julian calendar used by the Ukrainian Greek Catholic Church at the time, he was consecrated as bishop by Major Archbishop Sviatoslav Shevchuk and other hierarchs of the Ukrainian Greek Catholic Church in St. George's Cathedral, Lviv.

[8] In place of the red biretta given to the new cardinals of the Latin rite, Francis placed a black koukoulion with a red trim, a headdress typical of the Ukrainian monastic tradition consisting of a hood with two long lappets, on Bychok's head.