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: 539
Hash: 4f3004697a341e35794b1fef9a215dbd0ff674f5adf4c094204edebc4ec2130c
Previous block: 3b2797cdb429ba017a58a58360815ad5742b82b90591456aaeec0a3b456c121b
Next block: 21a44ebf514b9037f3e1e381b6d53fe90cd47ff4ac5336975d56d3dcaf47a3b3
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864233
Stripped size: 218
Size: 254
Nonce: 6
Merkle root: ff23d125e5ca9b8a645d55566e29aacab0830fa026a9bd363e61994b98dc85fd
Median time: 1701864232
Difficulty: 4.656542373906925e-10
Confirmations: 1705
Chainwork: 0000000000000000000000000000000000000000000000000000000000000438
Bits: 207fffff