Can a creature with blindsight see another creature that is Heavily Obscured?

If a creature is Heavily Obscured, can it be seen normally by a creature with blindsight? More specifically, will a creature with blindsight have disadvantage on attacks against the heavily obscured creature?

For example, say that a creature is Heavily Obscured by the effects of Fog Cloud or Shadow of Moil, can that creature be seen by a creature with blindsight?