Correct. This is why SpaceX rejected using black coatings alone for Starlink. Mirrored surfaces that they tested instead were darker than VANTA black.[0]

On some surfaces they use a SpaceX-designed coating called Low Reflectivity Black, which is the least specular space-rated paint by a factor of 5.[1]

[0] https://www.youtube.com/watch?v=MNc5yCYth5E#t=2430s

[1] https://starlink.com/public-files/BrightnessMitigationBestPr...