Hi,
Like Kurt said the Gradient Mesh Tool does not have that feature. The closest Tool to what you are requesting would be the Free Form Gradient tool: https://creativecloud.adobe.com/discover/article/make-it-in-a-minute-freeform-gradients
Other than that it's all about taking your time to get the desired finish with the gradient Mesh, I would imagine without having seen a screenshot.
Hope this helps,
Sim
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