The .accessibilityElement(children: ) modifier with the .ignore argument does a similar thing to set the container view to be an accessibility element in UIKit. It is the default argument, so you can just say .accessibilityElement().

Because of this, you'll need to use other modifiers to make it accessible and manually configure an accessibility label and value, traits... when necessary.
https://developer.apple.com/documentation/swiftui/view/accessibilityelement(children:)
https://developer.apple.com/documentation/swiftui/accessibilitychildbehavior/ignore
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It is possible to change the traversing order of accessibility elements by configuring the accessibilityElements array. You should try to avoid it, but one good reason for doing it is if the default order is illogical because of the visual layout.

Sometimes, you may want to create a custom component, even if there is a similar one in UIKit because you want to style it in a way that the default one won't let you. That's fine, just take into account that you'll need to make it accessible.

When implementing a UISlider, it is a good idea to consider how much the slider value should change when swiping up/down to adjust it. It might not always make sense to do it in 10% increments, which is the default behaviour. Could be because the value at those intervals doesn't make sense, or feel random, or because it wouldn't provide the user with a fine enough control being able to go through the whole slider in just 10 swipes. It user will still be able to adjust the slider to any value by double tapping and holding and then moving the finger left or right, bypassing VoiceOver gestures. VoiceOver announces the new value as it changes.