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: 20
Hash: 4800bb73fb0c92ccb36ab2068ea94112ccffe296a48940a034e0bd17d6dc9f5d
Previous block: 3b3bedc75892135c44cf3040f8b53cb8b57b931abee6328ea01e9a8833e23888
Next block: 3dccee3c19f969f8221ec286de37237a1f9931069827f45dd1c9edb9520bfccd
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597871
Stripped size: 217
Size: 217
Nonce: 0
Merkle root: 97c1bc44bb51d281291345a89c9a62a127ba6e627d8c0f33454aff13893a1217
Median time: 1701597870
Difficulty: 4.656542373906925e-10
Confirmations: 2224
Chainwork: 000000000000000000000000000000000000000000000000000000000000002a
Bits: 207fffff