Get more distance for Flic buttons in Home Assistant?


I am using this integration for my Flic buttons:

This is working fine without a problem.

The only thing is that the buttons only work in a short distance around the Pi 4B which is placed in a not so good position. But it has to be there because it is attached to a UPS and there will be an automation which switches off one NAS and the Home Assistant itself.

Does someone has an idea to get a greater distance for the Flic buttons?
Would it be possible to attach a Bluetooth dongle to the Pi and position it at a better place which is used by the flicd?