What role did the church and its leaders play in the events of the 14th and first half of the 15th century?

This period was for Russia a time of struggle against the Golden Horde yoke, and at the same time there was a strengthening of the Moscow principality and the unification of other lands and principalities around it. We are talking about the rule of the Moscow princes, from Daniel (died in 1303) to Ivan III (ruled from 1462 to 1505).

The church in those years was in fact the main ideological organization of the country, church people were the most literate and educated. The main events were as follows:

The metropolitan moved from Vladimir to Moscow (1326), it became the religious center of all Russian lands.
Regency of Metropolitan Alexy under the minor Dmitry Donskoy (around 1360).
The first autocephalous Metropolitan Jonah (1448).