In this case you would skip the ledger and just set two more piers. That said this is so close to the ground a wood deck will never work for a myriad of reasons, do a cement slab

2nd that^. It's not just fastening a ledger board, it's got to be flashed properly too. No such problems with an independent deck.

What about shifting from a wood deck and going towards a cinder block porch? Would that be feasible here?

What is a ‘cinder block porch’? Paving stones?

They used to make CMUs with cinders as aggregate.

Lighter weight than concrete.

I understand what cinder blocks are but I don’t understand how the op imagines using them.