Products can now be marked as recurring, so they are automatically added to the related contract when a sales order is created. This reduces manual follow-up for subscription-like sales and helps keep contract billing information aligned with confirmed orders.

... product to contract if it is recurring product on creation of sale order
- Task: https://www.odoo.com/web#id=9315&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.mDSbrxm5I4kNe8W7