AutoLinkTMP.cs

using TMPro;
using UnityEditor;
using UnityEngine.Localization.PropertyVariants;
using UnityEngine.Localization.PropertyVariants.TrackedObjects;
using UnityEngine.Localization.PropertyVariants.TrackedProperties;
 
public class AutoLinkTMP
{
    [MenuItem("CONTEXT/TextMeshProUGUI/Localize (With Localized Properties)")]
    static void LocalizeTMProText(MenuCommand command)
    {
        var target = command.context as TextMeshProUGUI;
 
        var localizer = target.gameObject.GetComponent<GameObjectLocalizer>() ?? target.gameObject.AddComponent<GameObjectLocalizer>();
        var trackedObject = localizer.GetTrackedObject<TrackedUGuiGraphic>(target, create: true);
        var trackedProp = trackedObject.AddTrackedProperty<LocalizedStringProperty>("m_text");
        trackedProp.LocalizedString.SetReference("My Table", "My Entry");
    }
}

https://forum.unity.com/threads/game-object-localizer-needs-a-way-to-add-text-property-to-assign-an-entry.1257438/#post-7990131