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: 245
Hash: 0c77b7f8c3d8b4978bc7795b8482e2ee83d8e8646bd940a7092f390a0caeac46
Previous block: 3998cd9a4e04d6cb2907e050fcd52091fa5149498549c5653acc7b8e8721afe0
Next block: 427074fb6ccdf91eed70d5a41c8660a2614facb34842ab2cefde2f7c4152581f
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597908
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: be1e4c98962705743ad7b084303e94a62dba50b408a6f7400c2ed56ba13615df
Median time: 1701597907
Difficulty: 4.656542373906925e-10
Confirmations: 1999
Chainwork: 00000000000000000000000000000000000000000000000000000000000001ec
Bits: 207fffff