create wsdl for XML webservice

Question

I have created a proxy webservice. Customer POST the XML data to my webservice URL. My webservice receives the data and transform this input request to Soap request. My webservice POST the transformed Soap request to backend. Backend process the data and send back Soap response. My webservice receives the Soap response and transform it to XML before sending it to customer.
Flow something like below

Request: Customer(XML)--> Proxy Webservice(Transform to SOAP)--> Backend(Soap Service)

Response: Backend(Soap Service)--> Proxy Webservice(Transform to XML)--> Customer(XML)

Request:

<p:Upload xmlns:p="http://gunguanoble.com.au/AMSXMLSchema/chekpoint">
  <LineEvent>
  <TID>00001</TID>
  <SID>57882</SID>
  <OID>I-RDOOC</OID>
  <BID>50506</BID>
  <LID>0001</LID>
  <Qty>16</Qty>
  <OpID>Direct Assignment</OpID>
  <WID>Route To CPR</WID>
  <TimeStamp>2020-05-14T10:38:17.725</TimeStamp>
</LineEvent>
</p:Upload>

Response:

<p:Download xmlns:p="http://gunguanoble.com.au/AMSXMLSchema/chekpoint">
  <LineEventResponse>
  <TID>00001</TID>
  <SID>57882</SID>
  <OID>I-RDOOC</OID>
 <RCode>000000</RCode>
 <RMessage>Success</RMessage>
</LineEventResponse>
</p:Download>

Now customer is asking for WSDL file to configure my proxy webservice at his end. Is it possible to generate WSDL for http XML service