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: 280
Hash: 408e33cddfd1d9a52b9f92d017338474c58307d52396e9218841f92ef9620e0d
Previous block: 7d63320c8f9fd2732d14d33dbdd1189eefa888a14da4fd36fca9b01aa98bde9f
Next block: 5b1fa858783469db04284a77a1b540e0096abab07b2fc9387aec0adc86f875a0
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597914
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 65f12cc896db845f18ee8d51419bb2d6d911fbb783285d3a75b75cc4a561b13b
Median time: 1701597913
Difficulty: 4.656542373906925e-10
Confirmations: 1964
Chainwork: 0000000000000000000000000000000000000000000000000000000000000232
Bits: 207fffff