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: 1512
Hash: 2f3d75d6ae3ab1e7154a262fddd9c93ed4cf335dc35ecfa212684abf369bcec1
Previous block: 5997e478eaea49f17ed82b26624aa41fecb677b07444b959f7164b659448202c
Next block: 2848ab8200f43188fd78343a9b3b325e6f881285f0daa4dc517658da91f48f2f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697659
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e3cc1225515c507b3fe03faea52bd103b8fb9e2d9cd02fc170fe332849ccf29d
Median time: 1718697659
Difficulty: 4.656542373906925e-10
Confirmations: 732
Chainwork: 0000000000000000000000000000000000000000000000000000000000000bd2
Bits: 207fffff