Can these be support columns with these brackets
Yes, those posts are probably supporting the beam (above). You’ll need to determine the load on the beam, size of existing beam, span from post(s) to wall, and location of footings.

The post without the metal base connector may just be decorative...to match the other post. However, either hire an architect or structural engineer OR submit more info regarding beam sizes, spans, footing locations, etc. for additional help.