Sending bundled transactions in one block

Hi! My name is Andrew.

I am a software developer and am learning about web3 and Blockchain, specifically for Ethereum based chains.

I have a specific issue that I am hoping someone here can help me with…

  1. I use PulseChain, an Ethereum fork started in May 2023, Chain Id 369.
  2. Due to my own stupidity/carelessness, I believe (though I’m not entirely sure) that one of my wallets was compromised (seed phrase exposed).
  3. The wallet is now empty except that it was used to initiate a stake…
  4. The stake ends in a few months, so I am concerned that a monitoring bot will automatically transfer my coins…
  5. Someone suggested that with Flashbots I can create a JavaSript that will bundle multiple transactions (ie. unlock stake and transfer coins to a safe wallet) so that they are included into a single block and thus preventing them being stolen…

Is the above correct?
I saw something about a flashbots RPC…will that support PulseChain?

Can someone in the community assist me?