FindAGrave is a bit of a free-for-all. Users can create new memorial records, with very basic information, and in doing so that user becomes the manager of the memorial. There's no constraint on users, so they can create memorials based on actual grave photos, burial registers or any other records.
Other users are then free to submit "suggested edits" to the manager, and the FindAGrave functionality allows the manager to review suggested edits and accept or reject them.
So just viewing a memorial record it isn't really clear who's responsible for what data on a memorial record.
The user who created the Sophia Hood memorial has created a very large number of memorials (400K+) so it's less likely they've done research on Sophia, and added the birth date and place themselves. My guess is that another user has submitted this data so there's no real way of knowing what evidence there is to support it.
FindAGrave users do have a history of suggested edits, both ones they've sent and received, so you could try contacting the memorial manager (the creator) to see if they have a record of who suggested the birth details and if they supplied any evidence.
As an aside, that "inscription" text doesn't really read like an inscription to me, what with the surname preceding the first name and being in upper case. It looks like the text was cut-n-pasted from some other record, which could be a transcript of the inscription but personally I think it's more likely from a burial record transcript.
Burial (my transcript from the register):
name: Sophia Hood
buried: 05 Feb 1824; St Leonard, Bilston
abode: Capon Field, Sedgley
age: 40 years
Looking at one of the other memorials that does have photos, it too has an "inscription" text of the same format, and doesn't include all the information clearly visible in the photos.
Sarah Howes (unknown-1823)
Inscription: HOWES Sarah 72years 21 Nov 1823 Bilston W.Leigh
https://www.findagrave.com/memorial/200203759/sarah-howesBurial (my transcript from the register):
name: Sarah Howes
buried: 21 Nov 1823; St Leonard, Bilston
abode: Bilston
age: 72 years
So this a very winded way of saying I think it's questionable whether there's actually an MI for Sophia, and if there is, whether it contains any more info.