Sadly, the very best datasets that seem publicly available are for Gulf Arabic dialect (where the money is) [1]
I suggest you contact https://www.icompass.tn/, a (Tunisian) startup specialized in Natural Language Processing...that process Arabic dialects and African languages
On a general note, I believe this kind of work should be a (urgently) nationally funded, because these countries will be forced to use second languages like French, or literary Arabic when AI/NLP becomes the dominant computing paradigm (bots, prompts...). A model in this respect is what Sweden is doing [1]. For mostly "oral" dialects (like Algerian I guess), collaborating with big names into adapting the best transcription models (like whisper) to them first is the key IMO.
[1] https://nyuad.nyu.edu/en/research/faculty-labs-and-projects/...