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: 2636
Hash: 7c4d05686b1268aa6c6ada4e8114e63aec9ab6c3ad22c70db034fab9f9f0649a
Previous block: 1ab47c9425a3757c4cc83c1e9d03d7e8bdd158698ad57d5a85be0ca2dc16fe54
Next block: 4770df06e3010062435a12d2be18a294c9e201fc162777f23cdf18b0f0ac4a3e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847326
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: c509a0c04c57c67dba74f06079e60b62dcdd77b4eefcb1a54057b66b7fe525d6
Median time: 1743847325
Difficulty: 4.656542373906925e-10
Confirmations: 7
Chainwork: 000000000000000000000000000000000000000000000000000000000000149a
Bits: 207fffff