I’m sure it is, but it really depends on how much “grunt” work one wants to do to achieve it. I don’t have a one stop solution answer for this. Duplicating the post type within CPTUI is actually really easy, just a case of “rename” the post type and DO NOT check the “migrate” posts part. However, we don’t have any functionality to duplicate the posts into the new post type with CPTUI.
I know of the Yoast Duplicate Post plugin at https://www.ads-software.com/plugins/duplicate-post/, and also https://www.ads-software.com/plugins/post-type-switcher/ but if you have 100s or more of posts needing duplicated, then it’s still a rather large task ahead.