Have a few hemangiomas on liver went for an ultrasound of gallbladder due to polyps and tech said liver cyst then I heard doppler flow is this cancer?

UNLIKELY. A liver cyst is a common finding on ultrasound of this organ. It is fluid filled. Tumors, whether benign or cancerous, are solid. Hemangiomas are also extremely common findings of liver ultrasound.
NO. Only your doctor can tell you what you have not the technician , speak to your doctor.