While I don't have a definitive answer, I wanted to share my findings so far. It seems that Enpass does utilize cloud-based infrastructure, and it's not uncommon for applications to leverage services like Amazon AWS for various purposes, such as data storage, synchronization, or even hosting their backend infrastructure. However, I can't say for certain if this specific connection is intended or if it's an anomaly.
In my quest for more information, I came across some interesting resources related to AWS Certified Solutions Architect courses. These courses delve into the intricacies of AWS services, architecture, and best practices. They might provide valuable insights into how Enpass or other applications leverage AWS infrastructure.