Russia mainly using standoff weapons like artillery and air attacks

 ISW reports that Russia is mainly using artillery, rockets, and air assaults in its current campaign in Ukraine/  I suspect this is because it has not successfully reconstituted its infantry since the debacle of the early days of the war.  Morale apparently continues to be a problem and the new conscripts are likely not up to the task.

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Russian troops continued to shell the entire frontline in Donetsk and Luhansk and secured several tactical advances on April 29.[6] Russian forces reportedly captured Yampil (directly west of Severodonetsk) on April 28 and are likely preparing to conduct further attacks east in the direction of Lyman.[7] Pro-Russian sources posted social media footage of Russian forces using thermobaric munitions against Ukrainian positions in Avdiivka, and the Ukrainian Head of the Donetsk Regional State Administration Serhiy Haidai claimed that Russian troops employed phosphorus bombs in Ocheretyne on April 29.[8] Haidai additionally stated that Ukrainian forces repelled an attempted Russian advance on the villages of Orikhove and Svitlychne on April 29.[9] The Ukrainian General Staff reported that intensified Russian fire against Ukrainian positions is intended to prevent Ukrainian troops from regrouping and that Ukrainian troops are conducting ”an active maneuver defense”—moving mechanized reinforcements in response to Russian attacks as needed rather than conducting a strict positional defense.[10]

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Apparently, a few of the BTG's are still functional to a limited extent. They are still a long way from their stated objectives on most fronts.

See, also from NY Times:

Russia Moving More Troops to Front as Offensive Appears to Falter

Russian forces normally based in the far-eastern reaches of the vast nation are being deployed to the main battle front in Ukraine, the Ukrainian military high command said on Saturday, a sign of the strain on Moscow’s military as it sustains heavy losses in the face of an increasingly well-armed resistance.

Moscow is trying to gain momentum in what the Pentagon has described as a “plodding” offensive in eastern Ukraine, as more powerful weapons from the West reach Ukrainian forces on the front lines.