Unicode literals are replaced with rectangle symbol when entering Unicode in the text field

Reproduction steps:
1. Open the attached “BugRepro” project
2. Open the “Assets/Scenes/SampleScene.unity” Scene
3. Select the “Text (TMP)” GameObject in the Hierarchy window
4. Observe the text input field in the Inspector window

Expected result: “\uf357 test” is displayed in the text input field
Actual result: “□ test” is displayed in the text input field

Reproducible with: 2023.1.0a20, 6000.0.19f1
Not reproducible with: 2021.3.43f1, 2022.3.46f1, 2023.1.0a19

Reproducible on: Windows 11
Not reproducible on: No other environment tested