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: 752
Hash: 72a3c6686a3452c082ad7efc1e09aab14b42920e493f26cf01c94b6f5702a42c
Previous block: 7f652f60bdb10b59048e62353edb20865e1f67dc44d235203cc9dc257534d382
Next block: 12fbc2f9be73e9a770786691e8ccf5936bc55b27337fd0c36b398333e139c6c7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864269
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 762969b7d4d32e027a88d1988622b59f5faccdd41389a693045ee2bc891ae746
Median time: 1701864268
Difficulty: 4.656542373906925e-10
Confirmations: 1492
Chainwork: 00000000000000000000000000000000000000000000000000000000000005e2
Bits: 207fffff