If you want approvers to be able to review the details for an object that they are asked to approve, make those users have View permission on the object. For example, if the users in group ABC will be required to approve assets that are switched to a certain lifecycle state, make sure that the users in group ABC have View permission on the assets that they will be asked to approve. Without View permission, approvers will not be able to examine the details of the assets that users submit to them for approval.