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: 2421
Hash: 5776c243ed69b11be7e36ae242a21d6c234e61f3f111159401ccff5c9eb54e40
Previous block: 532978ad259350c15499cc817e0a3439ca91caf9334137370da966d8f8f8f467
Next block: 4d560329d472f3750f602433e51464c49f7f7f0025ea5e085cf70e319dee11f9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847290
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: b5b9cef51dd09db444ee2829e02dd43b9bed37126ee4423081db9983f56a61ed
Median time: 1743847289
Difficulty: 4.656542373906925e-10
Confirmations: 222
Chainwork: 00000000000000000000000000000000000000000000000000000000000012ec
Bits: 207fffff