Rollup Question

Hi everyone - I understand that roll ups generally work by someone (potentially a sequencer) submitting (1) a batch of transactions in a compressed form (2) a pre-state root and the (3) post state root after the transactions have been processed.

And I understand how we ensure accuracy of the state transition via fraud proofs or ZK proofs.

But I struggle on the next step. So you have the current state root of the rollup sitting on an L1 contract, but what actually gets submitted to the Ethereum miners? Or put another way, how are state changes posted to the L1 so that balances are changed? And does this rollup to L1 transaction look different than a normal transaction?

Thanks!