Is there a way to replace background in rembg once removed?

[KirkNicholson]

Hi, apologies if this is a stupid question.
I can only see answers pertaining to the setting the colour of the removed background.
I know that there are ways to use take the PNG and paste it onto a background after it has been processed by rembg.
Is there a way point to a new desired background in one step using rembg?

Thank you for any input