I believe that these are often pelican/puffin/toucan crossings, but not always.
Yes, it is possible. We have a few of these in London where the junction is controlled by traffic signals and the crossing has dropped kerbs, tactile paving and dots across the carriageway. There is no button and there are no pedestrian signals, so you have to look at the traffic lights to determine when it is safe to cross. This is where the proposed crossing:signals=shared might be useful.
The nearest example to me is Fairfield Road E3 at its junction with Bow Road Bing street side imagery