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: 1935
Hash: 18622b5fae640226bafe2f1087a84c92dd082c286d025ebd1cbc3fc912825749
Previous block: 13313320d474019170202552c07e0a9a463008b2ae761740dc43ea499fa3fe0f
Next block: 6a154af302d42814c75b8253d1b4112375b9899bf951bfbb842f921728e4acba
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159246
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: a9e8c1268481a8c274cc9fb299e2b573e26a1c8b239ebfd61e32bdaccbbd4af7
Median time: 1719159245
Difficulty: 4.656542373906925e-10
Confirmations: 309
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f20
Bits: 207fffff