I've been trying out M5Burner Linux x64 v3.0 and while it detects ttyUSB0 devices just fine it fails to detect ttyACM0 devices like the latest M5Stack base v2.61.

Adding a temporarily sym link like below fixes the issue for me. This leads me to think that M5Burner v3.0 most likely only looks for ttyU* devices.

sudo ln -s /dev/ttyACM0 /dev/ttyUSB0

Thanks
Felix