On LineageOS, the navigation bar usually has a ring around it, on this ROM, the ring is missing.
The ring is meant to denote that there is a virtual assistant, as can be seen in the Sony ROM if you remove all the Gapps. However, I assume that the ring shows on LineageOS because it's forced to show because the navigation bar looks a bit off without the ring as the circle will be smaller than the other shapes.
On LineageOS, the navigation bar usually has a ring around it, on this ROM, the ring is missing.
The ring is meant to denote that there is a virtual assistant, as can be seen in the Sony ROM if you remove all the Gapps. However, I assume that the ring shows on LineageOS because it's forced to show because the navigation bar looks a bit off without the ring as the circle will be smaller than the other shapes.