Here is a video on how to remove the background without using a green background.
Remove.BG is a 3rd party service that you can use Darkroom Booth. It uses A.I. to recognize the subject and remove the
background without the need for a green or blue backdrop. Remove.bg currently supports images with a file size of up to 22 megabytes. You
can sign up and purchase credits by visiting there siteCredit pricing
is based on the number of credits you purchase and whether you have a
subscription. I have included a screenshot for reference.