prior to 11.4 had used kernel extensions which worked fine and allowed normal users through MDM to enrol and avast would work, with all shelds working and full diskk access.
I have come across this https://support.avast.com/en-ww/article/Mac-Legacy-System-Extensions
but am still getting “system application from avast securirty was blocked from loading”
have added SEXT from the MDM
Thanks