Oracle CPQ My Approvals Search REST API is giving 404 error not found.

Scenario: We want to fetch all the pending approvals based on the current logged-in user

Facing 404 not found issue while setting up "My Approvals Search" REST API in Bruno.

URL: https://<sitename>.com/rest/v19/commerceDocumentsOraclecpqoTransaction/actions/_my_approval_search

Request:
{
"criteria": {
"fields": [
"projectName",
"_id",
"_lock_status",
"_currency_pref",
"mainMathInput_Float1"
],
"orderby": [
"_currency_pref:DESC",
"projectName:ASC"
],
"limit": 10,
"offset": 20
}
}

Response:
{
"type": "HTTP://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html",
"title": "Action _my_approval_search doesn't exist or is not accessible in resource commerceDocumentsOraclecpqoTransaction for current user."
}

I reviewed the Help Documentation and prepared the URL and request body as instructed. I also tried multiple solutions recommended by Oracle Support, but the issue persists.