https://www.openstreetmap.org/node/4553924725

Is traffic_calming=yes correct and needed here?

It seems to me that all useful info is already provided by barrier tag and this is not adding anything (except opinion why this barrier was placed).

If traffic_calming key should be present - which specific value would be fitting here?

Note that this appears to be blocking access - which is mapped by barrier tag already.

Forwarding anonymous report from #Mapy.cz user, please verify: "Пионерский лагерь Голубые скалы."

This is Luhansk Oblast, Ukraine but not republic

"Такого нет"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2022-07-18T07:38:05Z
POI has no name
POI types: shop-convenience
#organicmaps

дороги нет, строится дом

отсюда на СВ дороги нет, строится дом

закрытые ворота

گرگان

В этом месте нет дороги и нескольких частных домов исправьте пожалуйста буду очень рад

Военная часть расформирована.