How to load transaction data by id Magento 2?

Get a specific Payment transaction details by the given Transaction id in Magento 2.

Retrieve the transaction details information will be an array of order id, txn_id, payment id, txn_type, and additional_information from the sales_payment_transaction database table.

The sales module has API TransactionRepositoryInterface, use get() method from the interface to fetch transactional data.

<?php
namespace Jesadiya\Transaction\Model;

use Psr\Log\LoggerInterface;
use Magento\Framework\Exception\NoSuchEntityException;
use Magento\Sales\Api\Data\TransactionInterface;
use Magento\Sales\Api\TransactionRepositoryInterface;

class TransactionInfo
{
    /**
     * @var LoggerInterface
     */
    private $logger;

    /**
     * @var TransactionRepositoryInterface
     */
    private $transactionRepository;

    public function __construct(
        TransactionRepositoryInterface $transactionRepository,
        LoggerInterface $logger
    ) {
        $this->transactionRepository = $transactionRepository;
        $this->logger = $logger;
    }

    /**
     * Loads a specified transaction by id
     *
     * @param int $transactionId
     * @return TransactionInterface|null
     */
    public function get(int $transactionId)
    {
        $transactionData = null;
        try {
            $transactionData = $this->transactionRepository->get($transactionId);
        } catch (NoSuchEntityException $exception) {
            $this->logger->critical($exception->getMessage());
        }
        return $transactionData;
    }
}

Call method with a valid argument,

$transactionId = 1;
$result = $this->get($transactionId);
echo $txnId = $result->getTxnId();
echo $parentTxnId = $result->getParentTxnId();
echo $txnType = $result->getTxnType();
echo $orderId = $result->getOrderId();

If you want to delete transaction id, Delete Transaction data from Magento 2