Select Renderer > Viewport 2.0 > . Under Bake Resolution for Unsupported Texture Types, increase your Color Textures resolution to, for example, 2048.
Click Re-bake All Textures to see the effect of the change.
Note You may experience slower performance with baked textures, depending on the bake resolution. In addition, your baked textures
may render with low quality if the baked resolution is set too low.