Bluetooth devices not found

Welcome to the Garuda forum @druaga.

Just FYI, Windows often creates problems with Bluetooth/Linux when dual booting.

There is a lot of helpful information regarding Bluetooth connectivity on the Arch wiki:

Some other links that may be informative:

Bluetooth is a minefield of issues, especially when dual booting Windows. Good luck finding a resolution to your BT problems, and again welcome to the Garuda community.