Masking people the selection has artefacts - no control

You could attempt to accomplish a SUBTRACT, and select Color Range, then click on the background.

Another possible way, and this actually comes from a AI Sky trick, is as shown in the following video. It may or may not work

• https://blog.dominey.photography/2023/09/15/sky-masking-tricks-you-must-know-in-adobe-lightroom/

Not to sure if you could copy/paste or create a preset to apply from the mask created, and then apply it to other photos, as the AI Person is a bit more involved than AI Sky (think multiple people, and selecting what person, what part of the person)

/edit/ Just attempted the AI Sky trick as an AI People trick, created a preset from a single person photo, applied it to another single person photo, it applied (this was an entire person) (I do not get offered a selection of what part of the person in this preset application). Then attempted on a multiple person, it applied to all the people (so not so great in terms of individual people)