As Snautzer01 says, source please?
US and UK intel has no indication of your assertion. Nor does the UAF. If you have any evidence of what you say, please send it to the US and UK intelligence agencies, and the the Ukrainians as well. I am sure thy would like to know that the majority of the soldiers they have been taking prisoner (in areas other than the Donetsk/Donbas/Luhansk regions) are really conscripted Ukrainians.
However, there is a report that Russia intends to begin conscripting Ukrainians from the newly occupied areas, and has done so in the past few years in Donetsk/Donbas/Luhansk. Is that what you are referring to? If so, those Ukrainians conscripted have been deployed in the occupied areas.
Also, are you confusing the term conscript with irregular?