What kind of biofeedback technology should I explore?

I want something that can work remotely or from home.

I am most interested in EEG, focus or neurofeedback.

I want breathing, coherence or heart-rate variability feedback.

I am interested in immersive light, sound, meditation or focus sessions.

I want to explore pulsed electromagnetic field or frequency-based sessions.

I want visual feedback, scans or biofield-oriented wellness reports.