I also tried using python cmd with this script to try and force it to check/toggle the VT flag on the texture and force the streaming, but to no avail:
import unreal
# Corrected asset path
texture_path = "/Game/Art/TextureName"
# Load the texture asset
texture = unreal.EditorAssetLibrary.load_asset(texture_path)
# Force-enable virtual texture streaming
texture.set_editor_property("virtual_texture_streaming", True)
# Save the asset
unreal.EditorAssetLibrary.save_asset(texture_path)