Pinch / Spread without thumb

Feature Requests
1

I would like to trigger actions when I pinch or spread 3 or 4 fingers.

However, the existing pinch and spread options require the use of a thumb. I do not want to use my thumb for these actions.

Is there any way to achieve this today, or would you consider adding it?

2

I'm also looking forward to this ability. The original pinch of macOS doesn't require the use of thumb, and it's very easy to use. Is it possible for us to add this option?