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: 256
Hash: 407be25ba0074dc1de9693b1ee115d635f1fe789dd8bb9417ab89dc0675f108d
Previous block: 7f49c97df477ba63bbd56acc0c64e9b182f48e8a051f8e8b842f60d6688aa689
Next block: 43b891101de9b9a4a2f77383026f502390f9eb2cbfbb32b7b2fe0696befb0f58
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597910
Stripped size: 218
Size: 218
Nonce: 5
Merkle root: 1d7a94644d3a6495df84609ab61754f829b57a14713b21433627f9126b6aae50
Median time: 1701597909
Difficulty: 4.656542373906925e-10
Confirmations: 1988
Chainwork: 0000000000000000000000000000000000000000000000000000000000000202
Bits: 207fffff