Hey @Epameinondas0D4C. Welcome to the Lightroom Classic community. I'll help you figure this out.
You can import photos directly into a Lightroom Classic catalog with Lightroom. You can bypass the camera's capture software and import directly from a camera.
Do you also use the Canon EOS utility on the laptop? EOS utility has the option to allow saving on the camera & the drive, which could be interfering with Lightroom.
If there is a storage card inside the camera, as a test, remove it & restart the camera while it is connected to your laptop & wait for Lightroom Classic to detect it again.
Let me know how it goes from here,