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: 391
Hash: 1fb0579c07c2efc282922037147f565f0c53464c54b919ddb433032bcfa71c6f
Previous block: 6f099b5c5d74c1ab9c19b552d0fc35bb88ba36a3863bcbf8b91004fcf6d1eae0
Next block: 148768d3ce62ca5387ff830bf992f3d0e51626217ba10cd2fe15581f52245c3d
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597932
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 2661c660ec33b0fb857855847c9533acb6ec268478f7665e66f5a0cd8f8a04c6
Median time: 1701597932
Difficulty: 4.656542373906925e-10
Confirmations: 1853
Chainwork: 0000000000000000000000000000000000000000000000000000000000000310
Bits: 207fffff