One of the primary sources and collections for traditional Arabic muwashahat, Min Kunuzina “Our Treasures”, can be downloaded here.
It’s a great source if you want to get into learning Arabic muwashahat. The poetry and melody is very old. Sometimes the poetry and the melody are authored by unknown individuals.
You also find some instrumental Samai written by Ottoman composers.
Even better if you can read Arabic, then you search these songs and find recordings.