Unable to Get RSSI from Flic 2 Using fliclib-linux-hci on Raspberry Pi

[Wand7698]

I’m working with a Flic 2 button and a Raspberry Pi Zero 2 W, using the fliclib-linux-hci Git SDK.

I successfully built my own Debian package from the SDK and installed it on the Pi:

Package:
flicd_1.0-1_arm64.deb

The daemon installs and runs correctly. Below is the systemd service I’m using:

cat /etc/systemd/system/flicd.service

[Unit]
Description=Flic Button Daemon
After=bluetooth.target
Requires=bluetooth.target

[Service]
Type=simple
ExecStart=/usr/bin/flicd -f /var/lib/flicd/flic.sqlite3
Restart=always
RestartSec=3
User=root

[Install]
WantedBy=multi-user.target

Pairing and button events work fine, so communication with the button is confirmed.

Issue

I’m trying to read RSSI (signal strength) from the Flic 2 button, or otherwise estimate distance between the Pi and the button.

I’ve tried multiple code variants (both modifying the SDK and external BLE approaches), but I’m unable to retrieve:

RSSI values

Any distance-related data

It seems like RSSI is either not exposed through the SDK, or not available during normal operation.

Questions

Is RSSI data available at all from Flic 2 via fliclib-linux-hci?

If not, is there an alternative supported way to estimate proximity or distance?

Does the Flic firmware intentionally block RSSI access for power or privacy reasons?

Has anyone successfully retrieved RSSI from a Flic 2 on Linux/Raspberry Pi?

Any guidance, confirmation, or examples would be greatly appreciated.
Thanks in advance!