The 2020 agreement indicates two things with respect to the Lachin corridor.
The first is that the Lachin corridor, which is five kilometres wide, shall provide a connection between Nagorno-Karabakh and Armenia and shall remain under the control of the Russian Federation's peacekeeping contingent. The other part of the paragraph is that the Republic of Azerbaijan shall guarantee the safety of citizens, vehicles and goods travelling along the corridor. There are dual responsibilities there.
Russia has clearly failed in its responsibility since it is distracted by the war in Ukraine. There's a power vacuum on the ground. Azeri authorities and their agents have quite clearly filled that power vacuum.