The overwhelming majority are well paid volunteers. The topic of conscription is highly political in Russia. Paying them is a major cost of the war and limitation on manpower. The pro war faction has been pushing for conscription to enable a surge, but meaningful conscription has not occurred.
https://www.cnn.com/2022/03/09/europe/russia-conscripts-figh...
And they’re being used in Kursk given that Putin is not bringing units from Donetsk to push them out (and is supplemented by DPRK)