On 09FEB2022, TASS reported that Su-35S fighters took part in interceptor training.  Su-25 ground attack aircraft played the role of invaders to be intercepted.

Russian Defense Ministry video, posted 09FEB2022, Eastern Military District S-400 missile system on patrol in the area around Brest, Belarus:

In December 2021, the Belarusian Defense Ministry said that they would continue air policing of the sky over the area of Belarus and Russia, along with Russian aircraft, for 2022.  Both Russian and Belarusian aircraft use the Red Star as their insignia.

On 08FEB2022, a joint Belarusian/Russian air patrol was flown, supposedly for the second time this month.

Russian Defense Ministry video, dated 08FEB2022, showing Tu-22M3 bombers, Su-30SM two seater and Su-35S single seater patrolling the sky over Belarus:

Another video dated 08FEB2022, shows Russian army bakers making bread for the troops now in Belarus:

New Cold War: RUSSIAN SU-30SM NOW PATROLLING THE SKY OVER BELARUS, WARGAMES ON THE GROUND UNDERWAY