There are several synonyms for the phrase "provide opinion on." One common one is "offer commentary," which indicates a more informal and conversational approach to expressing one's thoughts or insights. Another synonym is "give feedback," which implies a more structured and analytical approach to evaluating something. "Provide assessment" is another option, suggesting a more professional and objective evaluation of a topic. "Share perspective" is a more nuanced synonym, indicating a willingness to consider multiple viewpoints and provide a subjective perspective based on personal experience or expertise. Ultimately, the synonym chosen will depend on the context and nature of the situation in which the opinion is being expressed.