How? The README [0] states that a Mac is required. Do you mean that you use the Find My network to keep track of your Linux machine's location (as described in [1]), but not to locate devices (which requires either macOS or a proxy server running on macOS)?
[0] https://github.com/seemoo-lab/openhaystack?tab=readme-ov-fil...
[1] https://github.com/seemoo-lab/openhaystack/tree/main/Firmwar...