Steps to reproduce:
1. Open the attached "deeplinkTest" project
2. Ensure that both Show Splash Screen in Player Settings → Splash Image and Development Build in Build Settings is disabled
3. Build And Run
4. In XCode select Unity-iPhone target
5. In the Signing & Capabilities tab ensure that Bundle Identifier is set to (see comments) and Team is set to (see comments)
6. Press the “+ Capability” button and select Associated Domains capability, then add a (see comments) domain
7. Go to the Info tab, then in URL Types enter (see comments) in the Identifier property and change the Role to Viewer
8. Select Unity Framework target and go to Build Phases, then under Link Binary With Libraries add “WebKit.framework”, “libsqlite3.0.tbd”, “libz.tbd” and “AdServices.framework” (in this one set Status to Optional) Apple SDKs
9. Build and run the Xcode project on the device
10. Observe the Awake and Start URLs
11. Close the app
11. Create a note in the device’s Notes app and write in it (see comments) link
12. Click on a link (should open the app)
13. Observe the Awake and Start URLs

Expected result: The absolute URL is not empty
Actual result: The absolute URL is empty

Reproducible with: 2021.3.41f1, 2022.3.40f1, 6000.0.15f1

Testing environment: macOS Sonoma 14.5 (Intel), macOS 14.5 (M1 Max)
Not reproducible on: No other environment tested

Reproducible with these devices:
VLNQA00394 - iPhone 13 mini (MLK23ET/A), CPU: Apple A15 Bionic, OS: 16.2
VLNQA00357 - iPhone 12 Mini (MGE03ET/A), CPU: Apple A14 Bionic, GPU: Apple designed, OS: 14.1
VLNQA00297 - iPhone 11 Pro (MWC62ET/A), CPU: Apple A13 Bionic, GPU: Apple designed, OS: 15.3.1
VLNQA00543 - iPad mini 4 (WiFi) (MK9N2B/A), CPU: Apple A8, OS: 13.3