It looks like you might not have permission to respond to this review. With the right permissions, Knowledge Assistant will show you a review that needs a response and ask: “Would you like to see the next review, respond, or are you finished?” Here you can reply with “respond” to respond to reviews.
Thanks @Kristy_Huang. Our Client Success Manager jumped in and pointed out that this was about the service level this customer has, which must be the permission you were referring to. I tried this on a location that has the proper service level, and I received the prompt to respond to a review, as expected.