Can the Full Keyboard Access focus indicator be removed entirely?

Our app supports Full Keyboard Access. When an element is focused, the system-drawn FKA focus indicator (the ring/overlay) sits over the UI component. This overlay drops the content's colour contrast below the WCAG 2.1 minimums — 4.5:1 for text (1.4.3) and 3:1 for UI components and focus indicators (1.4.11) — causing the focused state to fail accessibility audits.

Is there a supported way to completely remove this focus overlay on a view without breaking FKA keyboard navigation or VoiceOver?

This is the screenshot that shows the overlay I'm referring to: the blue overlay focused on the Apple Account cell in Settings. Even in Apple's own UI, the grey secondary text inside the focused element clearly does not pass the colour contrast requirement.

Can the Full Keyboard Access focus indicator be removed entirely?
 
 
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