Djindewal has neither an ISO 639-3 code or a Glottocode. It is a strange case because the string “Djindewal” does not occur in this source:

Jefferies, Anthony (2011). Guwar, the language of Moreton Island, and its relationship to the Bandjalang and Yagara subgroups: a case for phylogenetic migratory expansion?. MPhil Thesis, School of Social Science, The University of Queensland.

I emailed Erich Round for clarification.

Also for:

https://phoible.org/inventories/view/2782
https://phoible.org/inventories/view/2988

Both are tagged as west2443

https://glottolog.org/resource/languoid/id/west2443

Looks like there's an ISO code:

https://iso639-3.sil.org/code/dja

but nothing in Glottolog.