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: 638
Hash: 59a20cb6706cf4be27ca4f022aba4c5254391b368d4630094164eac9cdb0a345
Previous block: 24771ff43c309c82fda0b97045ed84628d3ad1f5d1e7640d2980df729f2aa6dc
Next block: 2b1a3461e478e105d95c0e93af0cfee57ba571ede126cfd428afcfc3031587ac
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864250
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 257daac2aa8c0779fddb46d70a4fe20407ad30347b691a3ea513c42a3ed26b4c
Median time: 1701864249
Difficulty: 4.656542373906925e-10
Confirmations: 1606
Chainwork: 00000000000000000000000000000000000000000000000000000000000004fe
Bits: 207fffff