There are different definitions of what is "soft" ...depending on the reason.
It could be for someone who has had dental surgery and requires soft
This could be for someone with internal dietary health issues, requiring soft foods which could be a different list.
Likewise, it could be for post-surgery, and again a different reason, and perhaps different definition.
Or simply could just be for someone with a stomach flu bug, and needs soft til things settle down.
Best to get your advice from your medical professionals who know all the medical history for yourself or whomever this is for and not risk causing a further problem.
Good Luck!