UnityWebRequest can't establish an HTTPS/TLS connection to a server with a “SHA256RSA“ certificate when using a URL with a domain name on iOS devices

How to reproduce:
1. Build And Run the user’s attached “UnityWebRequestTLS12_2022.zip” project on an iOS device
2. In the app, press the “Send UnityWebRequest to "https://funrobgames.com:7500/Ping"“ button
3. Observe the text under the button

Expected result: Text is “ok”
Actual result: Text is “unable to complete ssl connection”

Reproducible with: 2022.1.0a5, 2022.1.24f1, 2022.3.11f1, 2023.1.16f1, 2023.2.0b14, 2023.3.0a10
Not reproducible with: 2021.3.31f1, 2022.1.0a4

Reproduced on:
VLNQA00494 - iPhone 14 Pro Max, 16.3.1 iOS
VLNQA00358 - iPhone 12, 14.1 iOS
VLNQA00392 - iPad (9th generation), 15.0 iOS
VLNQA00310 - iPad Pro 12.9", 13.4.1 iOS

Notes:

• not reproducible in the Editor, Android, Standalone Build (Windows, macOS)
• not reproducible if the URL contains only IP-address, it works