How to Set SOAP Headers When Using Invoke Apex SOAP Method in Salesforce Flow or MuleSoft Connector

Steps to Set SOAP Headers [CONTENT REQUIRED FROM SME]

The specific steps for setting SOAP headers will vary depending on whether you are using Apex or the MuleSoft Salesforce Connector. Please provide the step-by-step configuration instructions here.
For Salesforce flow using apex invocable methods- :https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_annotation_InvocableMethod.htm and How to set the SOAP headers while using Invoke Apex Soap Method in Salesforce Connector- https://help.salesforce.com/s/articleView?id=001115316&type=1 For MuleSoft Salesforce Connector-https://docs.mulesoft.com/salesforce-connector/latest/

<flow name="sf-contacts-cleanupFlow2">
		<http:listener doc:name="Listener" config-ref="HTTP_Listener_config" path="/apex"/>
		<ee:transform doc:name="Transform Message">
			<ee:message >
				<ee:set-payload ><![CDATA[%dw 2.0
output application/xml
ns ns0 http://soap.sforce.com/schemas/class/InvokeApexTest
---
{
	ns0#sayHello: {
		ns0#name: "Name",
		ns0#someNumber: 1
	}
}]]></ee:set-payload>
			</ee:message>
			<ee:variables >
				<ee:set-variable variableName="DebugHeader" ><![CDATA[%dw 2.0
output application/json
---
{
	"DebuggingHeader": {
		"debugLevel": "Debugonly"
	}
}]]></ee:set-variable>
			</ee:variables>
		</ee:transform>
		<salesforce:invoke-apex-soap-method doc:name="Invoke apex soap method" config-ref="Salesforce_Config" methodName="sayHello" className="InvokeApexTest" apexHeaders="#[vars.DebugHeader]">
		</salesforce:invoke-apex-soap-method>
		<ee:transform doc:name="Transform Message" >
			<ee:message >
				<ee:set-payload ><![CDATA[%dw 2.0
output application/json
---
payload]]></ee:set-payload>
			</ee:message>
		</ee:transform>
	</flow>

For information on Apex SOAP Headers, please refer to this Salesforce documentation.