What kind of device?????

There are a few steps you can take to try and identify if there are any hidden devices in your environment:

• Start by doing a thorough physical inspection of your home, vehicle, and personal items. Look for unusual objects or things that seem out of place. Pay special attention to small holes, objects that could hide a camera, and devices that are not yours.
• An RF (Radio Frequency) detector can help locate wireless transmitters. These devices are designed to detect radio signals emitted by hidden cameras and microphones. They can be found online or in specialty stores.
• Use your phone or computer to scan for Wi-Fi networks. Look for networks that you don't recognize, which could indicate a hidden device transmitting data.
• Consider hiring a professional to conduct a technical surveillance countermeasures (TSCM) sweep. These professionals are trained to find and disable hidden recording devices.
• Ensure that your personal devices like phones, computers, and smart home devices are not compromised. Check for unusual apps or software and reset your devices if necessary.
• Finally, if you believe someone is spying on you, it may be beneficial to consult with a legal professional to understand your rights and the steps you can take.

I'm just trying to understand what kind of device that can be hidden, and yet allow you to have real-time conversations with others with it. Can you, at least, identify whom you are conversing with? You don't have to tell us who, but do you recognize them?

Sorry, but what does this have to do with an Apple device? ... other than you have an iPhone 15 per your tagline.