Looking at the matrix here https://www.mongodb.com/docs/ops-manager/current/core/backup-preparations/#backup-features-supported-at-present it explicitly mentions a couple of different versions. As per suggestion here https://mongodb.slack.com/archives/C1WJ164MU/p1651775157589559?thread_ts=1651741209.224679&cid=C1WJ164MU the matrix should be simplified by just mentioning "MongoDB 4.2 with FCV : 4.2 and later", removing the two leftmost columns