@kkuzmickas Hello and welcome to OpenStreetMap!
How and whether to map "cycling on the sidewalk" infrastructure is a hotly-debated topic within OpenStreetMap.  There are cycling advocates that argue that everywhere it is allowed it should be mapped separately, and there are those (like Tomas here) who argue that "cycleway:right=oneway" is correct, and anything more would misrepresent the amount of cycling provision here.  Generally speaking, I suspect  that people with the former view are in the majority and people who agree with Tomas the minority.
However, what is correct in any individual case depends on that individual case.  
There does seem to be quite good Mapillary coverage here - see e.g. https://www.mapillary.com/app/?lat=54.674222222222&lng=25.272191666667027&z=17&pKey=505301730893404&focus=photo - and it does look like there's a strip of grass between the cycleway/sidewalk and the road, which would suggest that you were correct and Tomas was incorrect.
@Tomas%20Straupis do you have any comment on that?
Best Regards,
Andy Townsend, on behalf of OSM's Data Working Group.
