Issue with validator node and questions about duties as validator

Hi,

Hope all is well. I successfully created a validator node and pool 30 where I staked 120k. However, that pool is no longer showing. Can someone help please.

Also, as a validator I believe I am to approve transactions, however, I am not sure what system I use to do so or where do I do so… can you please guide me as to what exactly I need to do when running a node.

Thanks!