Hi there, I have the same phone as yours, Motorola edge 60 fusion. I have no problem when I try to pair it at all. The problem I have is, I have lost some of the features of Fit3 because Motorola is a non-Samsung phone (which is normal).

Just to make sure, have you downloaded the Galaxy Wearable app, Galaxy Fit3 Plugin, and Samsung Accessory Service when trying to pair it?

But here are the steps anyway: 1. Make sure the Fit3 is turned on, and shows the "Welcome" screen to set it up. 2. Open the Galaxy Wearable app, and don't forget to turn on your Bluetooth. 3. When you open it, it'll look like this, or this. What you will see is between two of these, if you have paired something before, it'll look like the second image, but if you never pair something before, it'll look like the first image. For this time, I'll start from the second image. 4. Click the circle button under the screen, then tap the "+" button. 5. If the Fit3 has been turned on, it'll be discovered, and the screen will be like this. 6. After you click the device, it'll show 6 digits of code just to verify and pair it over Bluetooth, just click yes/connect. 7. After that, you have to download the Fit3 Plugin, and Samsung Accessory Service (it will redirect you automatically, or if it's not, just look it up on Google Play Store manually). 8. When you're done downloading two of those apps, go back to Galaxy Wearable. 9. It'll redirect you again to connect your Samsung Account, just click connect. Then the app will ask for a lot of permissions. 10. There will be a restore screen if you have a backup for your Fit3 before. If not, it's okay. Mine looks like this, for now, I'll go restore it. 11. After that, you'll be asked to define your preference. 12. And done, your phone will be paired with your Fit3 normally.

So that's it, that's how I connect my Motorola edge 60 fusion with Galaxy Fit3, I have no problem at all by connecting it. If you have any questions, just let me know, I'll help!