How to invoke Patch method in Salesforce Apex REST?

Hi Udit,
@HttpPatch annotation is used at the method level and enables you to expose an Apex method as a REST resource. This method is called when an HTTP PATCH request is sent, and updates the specified resource.
for more details click on the below link:
https://www.sfdcstop.com/2019/11/salesforce-integration-tutorial-part-6.html