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: 1391
Hash: 42613229e8f56d434d75c2ebcecafedc697df1a66823969774b370d7ad8d4184
Previous block: 537455761862d8b7dc94bc7772b6979e83000850d616223dbcd42fb0b6481f5d
Next block: 75ced56789dfa4c7f34137bd91d2deae6fd91283a6f53ec5da1d835d0931002a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697639
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 9d1a1f6db97ad773188c70901146cf25f5558a7c651942994513a4f4de560380
Median time: 1718697638
Difficulty: 4.656542373906925e-10
Confirmations: 853
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ae0
Bits: 207fffff