Bluetooth issues with fenix 6 X pro solar and Google Pixel 6 Pro

I am having problems with the Bluetooth connection constantly getting lost between my Google Pixel 6 Pro and my fenix 6X pro solar. In the respective Google forums I read that this might be due to an older Bluetooth version on the watch than on the phone. 

Is there any way to update the Bluetooth version on the watch manually? 

Thanks a lot. Blush