GravaStar SiriusPlus War Damaged Edition Earbuds

These earbuds are pre-owned, the right earbud is working great, the left side is quiet. I'm not sure if this is an audio speaker issue or if an EQ setting was changed.
Aluminium Alloy Design: Crafted with a sleek and durable finish.
Bluetooth 5.3: Enjoy efficient, stable, and high-speed transmission for seamless audio experiences.
10mm Composite Diaphragm Dynamic Driver: Immerse yourself in high-fidelity sound with delicate clarity and deep bass.
Streamlined 6-Color RGB Ambient Light: Set the mood with enchanting RGB lighting.
Trendy Accessory: Comes with a built-in bottle opener.
Hybrid Dual-Feed Active Noise Cancellation (ANC): Block out distractions and enjoy pure tranquility wherever you are.
ENC Noise Reduction: Ensures crystal-clear calls, even in noisy environments.
One-Touch Lid Pop-Up: A unique and satisfying stress-relief feature.
Supports Mobile App: Customize your EQ settings and button functions via the dedicated app to tailor your listening experience.