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: 825
Hash: 0f37688ef38880d857d7e6760693c57b3fb70e314882d7608ce5dcc6ac8cce7e
Previous block: 4f29591d2dc14c987797f427a208c0805819667a59a07587555f338e20962f01
Next block: 64f1678d08e8affdc0741ed4f71835fbf94eed77911c8e125e7b5952b1d5f36d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857806
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 82247425b4f288ddc7b0cfac029ca94606e402ee284b4887cd74057c301ec9b0
Median time: 1707857805
Difficulty: 4.656542373906925e-10
Confirmations: 1419
Chainwork: 0000000000000000000000000000000000000000000000000000000000000674
Bits: 207fffff