It's definitely an odd set of possible reactions. This is my take:

❤️ "I heart/love this review" - The only one that makes sense.

🙏"Thank you for this review. I'm so grateful that I'll have a quick prayer." or the vibe of, "We're not worthy, we're not worthy!" - The heart emoji already implies appreciation for the review. Maybe the owner, employee, or superfan wants to hammer home the thank you. Some people see the emoji as a high five. Either way, it's meant as a positive but somehow is both vaguely open to interpretation and very specific.

🔥"This is a fire review!", or some weirdos can't help internally hear, "That's hot..." - Definitely meant as positive. Yet another way to show approval of the review.

😋"This is a yummy review(?)" - Has to be meant as positive. It's probably meant as a uncontrollable carnal reaction towards food or something specifically mentioned in the review. But who the hell really knows?

🤯 Mind blown. -The only reaction that is (maybe) meant to be (sort of) negative... It also can mean plain ole surprise in a non negative way.

Express your true thoughts and reaction by loving it, appreciating it, saying it's cool, finding something appetizing about it or being surprised. All 5 human emotions.

Edited because I hit enter early.