I'm currently using odoo v14 Enterprise, and I'm looking for a way to use nested models for mail_activity model in order to make email templates using data from the related model.

i.e. I will make an activity in project_task module and I want to send notifications to users through mail_template module, inheriting data from the project_task to the template like: 

• Client:
• Tags:
• Project:
• etc.
  

Is it possible to do so? At the moment I have checked through Odoo that I could add data from ir_model but that brings data related in Models table but not the current model: