How are apps ranked in trending apps

Your example has much better reviews and higher download count if I look for it

Hi, you can change the domain to apps.garmin.cn

Probably the data in apps.garmin.cn refers to that in apps.garmin.com which grants this author a high weight in rank system.

yes on `apps.garmin.cn` the count/reviews are like you show it on your screenshot.
Is there some censorship going on on that domain? My apps app don't show any reviews and very low download count on .cn apps.garmin.cn/.../apps

The domain looks like just a copy of apps.garmin.com. Generally, the users using apps.garmin.cn don't know English, if the description or settings of your apps are not localized , most tend to avoid using them. That's why your apps in apps.garmin.cn have little reviews and download.

Hmm, that's very interesting. I wonder if the stats I see on the Chinese site are already included in the stats I see on the .com site, or they are in addition to that?

NO. The data are separated. The data generated in .cn won't be transfered to .com, so no inclusion. All of this is due to Data Security Law of PRC released since 2017 LOL

Perhaps there is some bad guys using hack skills to manipulate the rank system.

I have seen this before and did sth. to boycott the disgusting manipulation. Garmin always keeps a blind eye on this.

Stats are separate.  For one of my apps I have over 400k in the .com store, yet that app only has 16k in the .cn store.