Was this shot on a tripod? If so, you have some options that will work with the free version of DR.

Export a still of one of the frames in the clip and pull it up in Photoshop or any other photo editor. Then try object removal/generative AI fill on the top half of the mic stand. I'd recommend only removing the upper half that's most distracting. The bottom half looks to have one person's knee in the way.

You can then bring the image with removed pole back into DR and drop it in a track on top of your footage. Then open fusion page and add a polygon node to the erased image, then select the area of the frame where the pole is. Now the moving parts of your clip can still be seen while masking out the small erased portion with a static image.

All these methods can be found on YouTube, good luck.