wordpress woocomerce Booking plug in -

My site plumber site we provide plumbing services as product. People can book appointments for one or more service pays them at checkout.
Once order received admin can select an engineer for the job on
Engineer can log in to the site / calendar view their appointments reschedule it if they want to. Once job is complete update the appointment status.
This all done using WooCommerce Appointments :
What I would like is when admin allocated an engineer for the job. Updated the appointment, that engineer should receive email notification of their appointment if notify engineer is checked

Please see attached admin appointment edit interface

the avobe part is completed

2nd thing is bring engineer my appointment page to front end with simpler interface. In-order to secure the wordpress backend. Where they would able reschedule or update appointment status i.e complete.

Notify admin and customer reschedule appointment date and time where applicable

Email template for engineer notification:
All content of the appointment
For customer:
Dear xx
We have resual your appointment for {{product title}
Appointment no.
Order no.
Status:
New date:
Time if applicable
Add on
Thanks
I-Care 247 managements

Email template should be easily editable to meet our need.

Please note Engineer should only be able update the appointment date/time note or status. Should not be able add new appointment or edit anything else.
to do this project you must be able to do custom coding , wordpress filter and action, woocomerce (php, javascript and mysql html css)