Customer Specific Requirement to have Multiple Line Items under an Activity

Summary

We have a requirement where we need to have multiple Order Line items under an activity

Content

Line items will be added from Sales Cloud to Quote and then on approval of the code an Activity will be created in Field Service. Our client wants to include Quote line items as part of the Activity which in turn will be part of Field Techncian mobility app on which customer will review and sign. Please I am struggling to create the solution for this requirement that how to add 1:M relationship in Field Service and even this is something possible.