Take out the paintbrush and cover it up! This is the basic solution to many “Fix it in Post” issues. At least in principle.
In practice, removing that logo, covering up the forgotten camera bag in the background, or hiding that ugly spot on the wall may be more complex. Yet a combination of the paint tool with Fusion’s planar tracker can give you a strong workflow.
You have two options with pros & cons on each side:
Paint out the problem area on a representative still frame. Then track the fixed area back onto the original plate.
Stabilize the problem area. Then paint or clone on the stabilized area before reversing the stabilization.
The first scenario is easiest for the paint task. If you are not a friend of Fusion’s paint node or if things get too difficult there, you can even take the still to another application. Photoshop comes to mind. Yet, this scenario becomes more difficult if the lighting changes over time.
In the second option, you can use the clone setting of the paint tool to extract background information on every frame. This will adjust to changes in lighting but it may get harder when objects leave the frame or get occluded.