I use MongoDB Atlas and I’ve been using the 4.0.14 version with no issues.
MongoDB Atlas have now announced that the version will be bumped to 4.2 in the next couple of weeks.
Does Graylog support 4.2?
https://docs.graylog.org/en/3.1/pages/installation.html shows that MongoDB 3.6 or 4.0 are supported.
Doesn’t mention if 4.x is supported.
Please let me know.