Only receiving mined (non pending) transactions when suscribing to "eth_newPendingTransactions"

[1aBcD1234aBcD1]

So basically Im trying to run the following code using my node as my RPC to get the pending transactions.

package main

import (
	"context"
	"fmt"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/ethclient"
	"github.com/ethereum/go-ethereum/rpc"
)

func main() {
	rpcClient, err := rpc.Dial("ws://localhost:8546")
	if err != nil {
		panic(err)
	}
	ethClient, err := ethclient.Dial("ws://localhost:8546")
	if err != nil {
		panic(err)
	}
	rpcTxChan := make(chan common.Hash)
	_, err = rpcClient.EthSubscribe(context.Background(), rpcTxChan, "newPendingTransactions")
	if err != nil {
		panic(err)
	}
	for {
		h := <-rpcTxChan
		_, pending, err := ethClient.TransactionByHash(context.Background(), h)
		if err != nil {
			panic(err)
		}
		fmt.Println(fmt.Sprintf("%s: %t", h.String(), pending))
	}
}

The issue here is where I check if the transactions are pending or not, where in all cases they are not. Also, it seems that I only receive "new transactions" when lets say "a new block is added into my node" which suggest me that I am only seen the transactions that have been processed in the latest block, each time a new block gets mined.

I dont know if this is intended or Im missing something with my node configuration. At the moment I am only running a read only node (not a validator).

Thanks in advance!