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: 753
Hash: 12fbc2f9be73e9a770786691e8ccf5936bc55b27337fd0c36b398333e139c6c7
Previous block: 72a3c6686a3452c082ad7efc1e09aab14b42920e493f26cf01c94b6f5702a42c
Next block: 1f014f1d53bc1ad156e9aa4c1c680177381b594d72661d5e777499ef5c6ad5aa
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864269
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: e8236489e78ad593b0fefaf971eeb9a4af0b67426f6ab5b28cda0c6c9d516c88
Median time: 1701864268
Difficulty: 4.656542373906925e-10
Confirmations: 1491
Chainwork: 00000000000000000000000000000000000000000000000000000000000005e4
Bits: 207fffff