Dear Cathy,
I don't think A4T integration alone will help to see the Analytics Segments in Target. Base A4T integration will help you to choose Analytics Metrics and Dimension as success events for target.
For segment sharing, you should share the segments to Marketing Cloud Experience Cloud : Below the snap from Segment Builder.
![]()

Once you share the segment, you can see the same in Audiences Tab of Target.

![]()
If you are unable to see 'Make this an Experience Cloud Audience' in Segment Builder make sure that you have enabled Marketing Cloud ID Service and reach Customer Care at CustomerCare@adobe.com
Thank You
Arun
![]()