Hello GHENAM

Thank you for your purchase.

Well there is no built-in feature, but there is some workaround. For example if your service costs $20 and if you want to set deposit of 20% to pay online and rest onsite, you can make service where you will set price of $4 (which is 20% of $20) and then explain in service title and description how much is the real price of this service.

Hi again GHENAM

The feature is planned, but it will not be released in the near future.

You can try with the workaround suggested in my previous response, or with WooCommerce deposits.

It is all the same to your customers, really - if they need to pay a deposit % you can set that to be the price of the service, and then inform them, that the price they're paying right away is only a percentage of what needs to be paid in person.