What Makes a transaction in txPool not mined ?
Miners generally mine transactions that will pay them the highest gas fee for doing so. Because of this, each block is a sort of auction where the highest bidders (in terms of
gasPrice) get included in the block.
A transaction sitting in the txPool generally means that the supplied
gasPrice is not high enough for a miner to want to accept it. You can check here for current gas prices.
If you want to speed up this process, simply resend the transaction and choose a higher