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: 157
Hash: 4eaa10ff9872504d244a79313b68147d29832c8d9f988a4096c6edd49e38edeb
Previous block: 64de0832532565470a03801753f73ef84f39751ee9328c53adc9cef228609771
Next block: 57e047a9c842fcf3d2cf9f95a68e0bdc91d53f2ebaf50e60732d5153b04e8ac7
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597893
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 006e33c1aa1ee4582956c5bfecc15dc5aefe0a911a216103458d20819dbbc27c
Median time: 1701597893
Difficulty: 4.656542373906925e-10
Confirmations: 2087
Chainwork: 000000000000000000000000000000000000000000000000000000000000013c
Bits: 207fffff