In certain situations two interactive elements receive focus when users use the swipe gesture to navigate on the screen. When two controls receive focus together, user will not be able to interact with desired control.
For example, on a left to right swipe on an app, talkback announces From button To button, on double tap which control is activated?
By ensuring that the controls are placed in different views or container’s in many situations the interactive elements can be accessibility separated. This will allow the talkback or voiceover users to navigate to each individual item with swipe gesture or using explore by touch.
WCAG Success Criteria
2.4.3 Focus Order (Level A)