Hi, thanks for getting in contact.
I'm afraid at present it is unlikely that you would be approved for a Shared Ownership mortgage whilst currently in a DMP.
Shared Ownership is very tricky with credit issues as due to current events there is essentially only 1 specialist lender in the UK considering these applications.
Have you explored the option of the Help to Buy equity scheme?
That offers some flexibility with deposit and can be possible with your credit profile.