This was reported on the Roscosmos website.

It is noted that “these launch vehicles are intended for launches under the Russian program of the International Space Station: stage 1a - for launching the Progress MS transport cargo vehicle, stage 1b, in turn, is intended for launching the Progress M-UM transport cargo module with the "Berth" nodal module.

The “Prichal” universal nodal module designed and manufactured by the SP Korolev Rocket and Space Corporation Energia (part of Roscosmos) is intended to expand the technical and operational capabilities of the Russian segment of the International Space Station.

Launching the Prichal into a near-earth orbit and docking to the nadir node of the multipurpose laboratory module Nauka is planned for November 2021, ”the message says.

Earlier, the head of Roscosmos Dmitry Rogozin said that the next launch of Soyuz-2.1b with OneWeb satellites from the Baikonur cosmodrome is scheduled for August 20.