Hello Dale louden,
Thank you for reaching out in Apple Support Communities. We understand you're noticing the icon of Voice Control appearing in the status bar of your iPhone, when it's locked. We'll be happy to help.
To help troubleshoot this behavior, we recommend to temporarily turn off, Voice Control in Settings > Accessibility > Voice Control. Then, restart your iPhone and turn on, Voice Control. Please test your device and see if you continue to experience the same behavior.
If needed, here's how to properly restart your iPhone: Restart your iPhone
We look forward to hearing back from you with an update.
Kind regards.