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: 604
Hash: 648a73815cbed4e941008ecd5a510d406f3c06929d12f1a3fb643677934b0e65
Previous block: 466422dd6271be60cdebf447608a5a51fb1f5f6caa1721bce79529503f00370d
Next block: 28dc3113dd546fa7d903236508867feca115579079d4b53efc1a2ccfe0504578
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864244
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: b5f718c8160a7087989f8f550515621f2fbcd9ce31fe398df5e325abb962721d
Median time: 1701864243
Difficulty: 4.656542373906925e-10
Confirmations: 1640
Chainwork: 00000000000000000000000000000000000000000000000000000000000004ba
Bits: 207fffff