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: 818
Hash: 5cb21196e82ce945a8eb0cd15991971878b303dc8e46900d7082724e2de27f86
Previous block: 1f7fb47cd7af47526406d1ba2aef825423caf0501e4046ab0570cdf8dde40e7c
Next block: 21f686832c8dacb7247a6044c2c39143f524e2eb2d13340fa91670c0635fad97
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857805
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 6ed0687cce3a6f20449191f49c0630757f055e2619e4b92b1e82006b2c1dec9b
Median time: 1707857804
Difficulty: 4.656542373906925e-10
Confirmations: 1426
Chainwork: 0000000000000000000000000000000000000000000000000000000000000666
Bits: 207fffff