Well, it looks like UOC-USA accepted him as a canonical bishop, his controversial relationship with UAOC nonwithstanding:http://orthodoxwiki.org/Mstyslav_(Skrypnyk)_of_Kiev
When the Ukrainian Committee and the Temporary Church Council was formed in Cholm (Chelm), Skrypnyk was elected a council deputy head (1940). In April 1942 Skrypnyk, by then a widower, entered the priesthood. He took monastic vows in the following month and soon after was consecrated (May 14) as the Bishop of Pereiaslav by the Ukrainian Autocephalous Orthodox Church (UAOC). The consecration took place in the famous Church of St Andrew in Kiev.
In August, 1942, the German occupational authorities banned Mstyslav from Kiev General-Governorate. As Mstyslav disobeyed the order, he was arrested in Rivne. On Gestapo accusations he spent half a year imprisoned in Chernihiv and Pryluky. He was freed in Spring 1943 but was ordered not to leave Kiev and banned from conducting the religious services.
In 1944 he moved to Warsaw and later to Germany where he was the head of the Ukrainian Orthodox eparchies in Hessen and Wurtemberg. In 1947 he left for Canada where he was elected the first hierarch of the Ukrainian Greek Orthodox Church (now known as the Ukrainian Orthodox Church of Canada) as archbishop of Winnipeg. In 1949 he resigned from his see.
The Ukrainian Orthodox Church of the USA
In 1949 he also became the metropolitan of the Ukrainian Orthodox Church in the USA. At the 1949 Council in New York he succeeded in bringing about unification with the eparchy of Bishop Ioan Teodorovych, who became Metropolitan of the UOC of USA. Bishop Mstyslav became his deputy and the head of the consistory. In the US, Bishop Mstyslav began extensive church activity with the Ukrainian Orthodox Center, a publishing house, library and seminary being built in South Bound Brook, New Jersey. In 1969 his authority was extended over the Ukrainian Autocephalous Orthodox Churches of Europe and Australia. During his meetings with Ecumenical Patriarch in 1963 and 1971 he brought up the issue of the canonical recognition of the Ukrainian Diaspora churches (UAOC was banned in the USSR, and hence in Soviet Ukraine at that time).
In 1990 he returned to Ukraine where at his age of 92 he was elected the first Patriarch of Kiev and all Ukraine of the UAOC following its controversial and short-lived union with the recently proclaimed Ukrainian Orthodox Church - Kiev Patriarchate. He was enthroned as Patriach Mstyslav on November 6, 1990.
As the status of the new church as well as the overall situation with the Orthodox faith in Ukraine became a subject of wide controversy, following the 1991 attainment of Ukrainian independence (and continued to this day, see History of Christianity in Ukraine), the newly elected ailing patriarch was unable to alleviate any of the problems. He soon died (June 11, 1993) while back in Canada at the age of 95 and was buried in the Ukrainian Orthodox Church in the USA center in Bound Brook, New Jersey.