Improving iCloud Sync Speed for SwiftData in iOS and watchOS Apps

Question

I'm developing an iOS app (for iPhone and iPad) with a watchOS companion app using SwiftData and iCloud. I've set up the following:

• SwiftData model with optional/default parameters
• iCloud capability with CloudKit, using the same container for both iOS and watchOS targets
• Background modes with remote notifications enabled
• App Sandbox entitlement set to true

Everything syncs well across devices (iPhone, iPad, and Apple Watch). However, I'm noticing a lag in real-time synchronization (around 40 seconds), which I understand is expected given the process.

My goal is to have faster sync times, especially since I plan to include widgets.

What are some best practices or strategies to minimize sync lag with iCloud? Am I missing any important steps or configurations?

I am expecting almost instantaneous updates, but there is a noticeable lag.