Aerial imagery shows stairs and step. And the path that is is nearby is not really viable.

Kreisverkehr. Turning circle. See Mapillary

This are is closed. Blocked by fences. Maybe mark with lifecycle?

This highway service is wrong. There is a generator house with solar in the way.

Steps and other features need re-survey

The layer need to be reviewed. The ramp gives access to different layer. See Mapillary.

„Indoor SC“ - maybe a gym that is still open on the otherwise closed off area?

Digital soccer goal. See Mapillary. How to map this?

Tennis Place. See Mapillary.