Transaction id does not exist in V2 API /v2/transactions/pending or algodClient.pending_transactions

The result from V2 API: https://node.algoexplorerapi.io/v2/transactions/pending?max=1
is

{
  "top-transactions": [
    {
      "sig": "FwOnRCFHNbVcb7Y6rZ6+zvmak14yit7QLT1VjWJ9cx5+xmIz4EhKGc3q0f9rm7+UZdRfD79OzjkNB2yFEYGuAw==",
      "txn": {
        "aamt": 1,
        "arcv": "C7RYOGEWDT7HZM3HKPSMU7QGWTRWR3EPOQTJ2OHXGYLARD3X62DNWELS34",
        "fee": 1000,
        "fv": 25082964,
        "gen": "mainnet-v1.0",
        "gh": "wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
        "lv": 25083964,
        "note": "eyJpIjoiOTg0NmQxYzk3MGUyNzBjMzEyNzBiMGNlZDQyMTU4ZWQiLCJ3IjoiNDdkMDFhYmM0YWY3MjZhZDhkNTEyMjExN2E3MjUwNmEiLCJ3ciI6MjI2NSwid2QiOi02LCJiIjoiNTMwMzVjNjBlMGFjMmIyM2E5ZTkwODI5MTc4NWEyNzgiLCJiciI6MjI2OCwiYmQiOjUsImYiOiIyMDIyLTA1LTAyVDE1OjQ4OjAyWiJ9",
        "snd": "C7RYOGEWDT7HZM3HKPSMU7QGWTRWR3EPOQTJ2OHXGYLARD3X62DNWELS34",
        "type": "axfer",
        "xaid": 127746157
      }
    }
  ],
  "total-transactions": 59
}

How can I find the tx id here ??!

Could you specify a bit more of the problem? Are you trying to find the transaction id of the asset? ? maybe you should just query for the asset? with /assets/{asset-id}/transactions