before Αγνώστου Στρατιώτη, it seems wide enough for one able bodied person. After, the dirt promenade path merges with the cycleway, separated by the tree row, becomes paved and is clearly meant to be used by pedestrians. Just because people do something ill advised like walking in the path of cyclists, doesn't mean we should reccomend it in OSM routing! I have made some routing adjustments, see if they are satisfactory (I am not local to this town, all of this is from seeing it on Mapillary 360 imagery).