Quickbooks Online - Cannot get LinkedTxn detail - quickbooks

Question

I created an Expense record and linked to an Invoice. When i import Invoice object through API, it has linked transaction as below.
"LinkedTxn":[{
"TxnId":"1356", //Id of Expense
"TxnType":"ReimburseCharge" //Type showing as ReimburseCharge
}]
In Quickbooks online docs, it is mentiond as
Links to expenses incurred on behalf of the customer are returned in
the response with LinkedTxn.TxnType set to ReimbCharge, ChargeCredit
or StatementCharge corresponding to billable customer expenses of type
Cash, Delayed Credit, and Delayed Charge, respectively. Links to these
types of transactions are established within the QuickBooks UI, only,
and are available as read-only at the API level.
Use LinkedTxn.TxnLineId as the ID in a separate read request for the
specific resource to retrieve details of the linked object.
In response it is showing TxnType as ReimburseCharge, but I didn't see any object like that in api explorer or docs. I don't know what type of object to request with id. I tried with Purchase, PurchaseOrder, Bill etc. but not of the request returned expected expense record.
Please help on how to access this Expense record with linked transaction id through api.
Invoice JSON:
Invoice line with description Printing paper is the expense linked in this invoice.
{
"Invoice":{
"Id":"1358",
"LinkedTxn":[
{
"TxnId":"1356",
"TxnType":"ReimburseCharge"
}
],
"Line":[
{
"Id":"1",
"LineNum":1,
"Description":"Printing paper",
"DetailType":"DescriptionOnly",
"DescriptionLineDetail":{
}
},
{
"Id":"3",
"LineNum":2,
"Description":"Magazine Monthly",
"Amount":100.0,
"DetailType":"SalesItemLineDetail",
"SalesItemLineDetail":{
"ItemRef":{
"value":"19",
"name":"Publications:Magazine Monthly"
},
"UnitPrice":100,
"Qty":1,
"TaxCodeRef":{
"value":"NON"
}
}
},
{
"Amount":250.0,
"DetailType":"SubTotalLineDetail",
"SubTotalLineDetail":{
}
}
],
"Balance":250.0
}
}

Answer 1

The docs are a little confusing on this point - unfortunately, the second paragraph
Use LinkedTxn.TxnLineId as the ID in a separate read request for the specific resource to retrieve details of the linked object.
is a generic paragraph that appears for docs on every Ref type, but shouldn't appear here. It's impossible to access these transactions via the API. More detail available here.