docs: send user operations eoa doc

site/pages/react/send-user-operations.mdx

@@ -115,3 +115,57 @@ export default function MyOpSenderComponent() {
   );
 }
 ```
+
+## Handling EOA Connections
+
+If your application uses an Externally Owned Account (EOA) connection, you don't need to specify a Smart Contract Account (SCA) client explicitly. Simply pass undefined as the client parameter, or use a standard SCA client if one is available. The SDK will automatically detect and handle the EOA connection when applicable.
+
+The SDK abstracts routing between User Operations (UOs) and traditional transactions (TXNs). When no Smart Contract Account (SCA) client is provided, or if an EOA connection is detected, transactions will default to using the EOA.
+
+In the example below we have enabled EOAs to login. `useSendUserOperation` will automatically detect the EOA connection and send the transaction and return the transaction hash.
+
+```tsx twoslash
+import React from "react";
+import {
+  type UseSendUserOperationResult,
+  useSendUserOperation,
+  useSmartAccountClient,
+} from "@account-kit/react";
+
+export default function MyOpSenderComponent() {
+  const { sendUserOperation, isSendingUserOperation } = useSendUserOperation({
+    uo: {
+      target: "0x...",
+      data: "0x...",
+      value: 0n,
+    },
+    // optional parameter that will wait for the transaction to be mined before returning
+    waitForTxn: true,
+    onSuccess: ({ hash, request }) => {
+      // [optional] Do something with the hash and request
+    },
+    onError: (error) => {
+      // [optional] Do something with the error
+    },
+  });
+
+  return (
+    <div>
+      <button
+        onClick={() =>
+          sendUserOperation({
+            uo: {
+              target: "0xTARGET_ADDRESS",
+              data: "0x",
+              value: 0n,
+            },
+          })
+        }
+        disabled={isSendingUserOperation}
+      >
+        {isSendingUserOperation ? "Sending..." : "Send UO"}
+      </button>
+    </div>
+  );
+}
+```