Learn Farsi: برخی‌شان درباره اموال اختلاف دارند. - Some of them have a dispute over the properties.

The word barkhi means "some", and -shān is the third-person plural possessive enclitic ("their" or "them"). In Farsi, you can attach these enclitics directly to quantifiers to create a partitive construction, which singles out a part of a larger group. Instead of using the longer phrase barkhi az ānhā (some of them), you can simply say barkhi-shān.

I don't see a regular plural suffix on amvāl. Is it a singular or plural noun?

It is plural! amvāl is a "broken plural" borrowed from Arabic, meaning the internal letters change rather than taking a standard Farsi suffix like -hā. Its singular form is māl, which means "property" or "wealth". At the B2 level, you will encounter many of these broken plurals, especially in formal, journalistic, or legal contexts.

Is there an unwritten ezāfe linking darbāre and amvāl?

Yes! The word darbāre (about / concerning) acts as a preposition here and needs an ezāfe to connect to the noun that follows it. Because darbāre ends in a silent 'h' (which represents an 'e' vowel sound), the ezāfe is pronounced as an extra 'ye' sound: darbāre-ye amvāl.

Does ekhtelāf dāshtan strictly mean "to have a dispute"?

Not strictly. The core meaning of the noun ekhtelāf is "difference" or "disagreement". In other contexts, it might just mean a mathematical difference or a difference of opinion. However, when applied to people interacting over assets or rights, naturally translates to them having a "dispute" or "conflict".