The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 40
Hash: 5ebb1f43e2770b9647ae3699a84fbc715ae7bad43bc9b5a313f4868cbb87d209
Previous block: 49e27b5c73cf5a3f236a6759df428825b2550348fbdb450896b03843972ee233
Next block: 63d05438de3069d936f59ede3eb0c8ce5642fc2a9a48bccfbeef3baa4a50dcdf
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597874
Stripped size: 217
Size: 217
Nonce: 0
Merkle root: ba4e64ba1bd199e3ed7c117ee6b78586150d072d9fcca817706832aa0ca01500
Median time: 1701597873
Difficulty: 4.656542373906925e-10
Confirmations: 2204
Chainwork: 0000000000000000000000000000000000000000000000000000000000000052
Bits: 207fffff