VoiceOver accessibility problem visually hidden parts are still being exposed to the screen reader when selecting Focus or hide sidebar

[SRonald675]

When choosing to hide the sidebar, whilst it is visually hidden, it remains exposed to the screen reader. This is also true with Focus mode. The result being these are not functioning as intended

Accessibility Context
OS: Sequoia 15.7.4
Screen Reader: VoiceOver
Hardware: Intel MacBook Air
Extensions: None active
Mode: Speech-only, no Braille