Ok.
Then it should DETECT THE TRANSACTION AT LEAST.I am aware of priorities. Higher preference would be given to higher bytes fees but at least DETECT IT. Mempool says transaction not found. It is one thing to detect a transaction and it is another thing to process such transaction. This is an unfair treatment given to me and I believe it should be addressed properly
there is no centralised mempool that mining pools use
each fullnode sets its own default mempool limit. some purge more the 300mb some less, some more
mempool.space's node has a lower storage amount
this does not mean that your transaction is forgot by the entire network. just not seen by one websites node
dont be upset that one website doesnt see your transaction.. mempool.space is not a network feature mining pools grab transactions from.. its jsut a website of a name of something but does not signify by namesake that its what the network uses as anything central to te network
for instance blockchain.com is not the central storage of the network blockchain. its just a website with a name. the name does not mean its the central repository of everyones blockdata people grab data from.. its just once instance showing its own nodes display..
by seeing that mining pools do randomly select (lottery) cheaper transactions proves that mining pools do see cheaper transactions IN THEIR mempools of THEIR nodes. but you are just part of the lottery of the ~120 of 17k tx basket of your fee range yet to be selected at random..