Can you set custom percentage for tips for different services?

[ActionCuts]

Is there a way to set custom amount tips per service?

[Minion]

I don't think you can do it for different services, but more so as a whole.  You could set a custom tip in the app which would allow the customers to custom tip

https://squareup.com/help/us/en/article/5069-accept-tips-with-the-square-app