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: 77
Hash: 513e1632a4804341be9efcdf990db2a55800689262990887f4f4f13e2bd1e3d5
Previous block: 564f16bf5ac031ad7917b34e0f158c4340f2390b26cf7e6ae7e1c7ccae847559
Next block: 02fb45d783449696d31065c1c2eeaff957aff7f726077c565c2b9f82091bce56
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597880
Stripped size: 217
Size: 217
Nonce: 3
Merkle root: ac37f1e0e439125ae8ea5417b0e778b673853862071df661166947ac696b9b21
Median time: 1701597879
Difficulty: 4.656542373906925e-10
Confirmations: 2167
Chainwork: 000000000000000000000000000000000000000000000000000000000000009c
Bits: 207fffff