Charge 4 won't sync with my iPhone XS

[Lillaria]

My watch won't sync with my phone (iPhone XS). I have reinstalled the app and restarted the watch both through the watch itself and connected to the computer. The watch says I need to update the app. Can't find any help in the manual for this and don't want to delete all data (doubt that would help). Anyone know how to do a more thorough reboot?

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @Lillaria. Welcome to the Fitbit Community Forums. Thanks for trying to troubleshoot the issue with your Charge 4 before reaching out.

In addition to the steps you've done, please try the following in the order listed:

• Unpair your Charge 4 from your phone's Bluetooth and Fitbit app.
• Unpair other Bluetooth devices that you may also have paired to your phone's Bluetooth settings.
• Force quit the Fitbit app.
• Turn off other Bluetooth connections when not in use. This can help to prevent connectivity issues or Bluetooth interference.
• Shut off your phone and turn it on after 1-2 minutes.
• Turn on the Bluetooth on your phone.
• Plug it into the charging cable and open the Fitbit app.
• Set up your Charge 4.
• If there is no connection, restart your Charge 4.
• Once your Charge 4 is paired and syncing, please proceed to set up your other Bluetooth devices to your phone again. 

With the steps above, what I want you to do is to pair your Luxe first to your phone's Bluetooth settings before any other Bluetooth device is connected to your phone. 

[Lillaria]

Hello. Tried this several times but it doesn't work. On the Fitbit it just says "Download or update the Fitbit app to activate". Tried deleting the app and reinstalling it but it still doesn't work. Also rebooted the device. Any more tips or is it completely broken?

https://drive.google.com/file/d/1wWzSPeTvJtAPivglzqzhVt0SPcEHbiX5/view?usp=sharing