Learn Turkish: Olası riskleri konuştuk. - We discussed the likely risks.

While you can absolutely say olası riskler hakkında konuştuk (we talked about the likely risks), adding the accusative case directly to the topic with the verb konuşmak translates more closely to 'to discuss'. Saying riskleri konuştuk is a very common, natural, and concise way to say 'we discussed the risks' without needing extra postpositions.

Is the word olası related to the verb olmak?

Yes! Olası (possible, likely) is derived from olmak (to be / to happen). It uses the suffix -ası/esi, which turns verbs into adjectives describing a tendency or likelihood. You will often see it in formal, academic, or professional contexts, such as olası sonuçlar (possible outcomes) or olası çözümler (likely solutions).

Could I use belki in this sentence instead of olası to mean 'possible risks'?

No, because they function differently. Belki is an adverb meaning 'maybe' or 'perhaps', and it is used to modify an entire statement (for example, Belki riskleri konuştuk would mean 'Maybe we discussed the risks'). Olası is an adjective meaning 'possible' or 'likely', so it must be used directly in front of a noun to describe it, just as it modifies riskleri here.