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: 139
Hash: 6005086660605e00952eb22dc02b194368943d806fece987e5fb3f37c002551f
Previous block: 4691d19cf4abb76a0bfec876a12ffc176c222292b3062b43206b2a5ea80d011f
Next block: 64ce7e489eb5e4c901d403fd9e7d8d632c65d054b487e9a1aedae8118f7ef973
Weight: 872
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597890
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: e8746c6a8d02836788f7c3cf827adb93beb1b7e95e9ffca62e14cbd33c7646bb
Median time: 1701597890
Difficulty: 4.656542373906925e-10
Confirmations: 2105
Chainwork: 0000000000000000000000000000000000000000000000000000000000000118
Bits: 207fffff