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: 190
Hash: 30d5ee92f74917dd1eff89b96056a1911b6e61429af261711628fd65165dc3c4
Previous block: 173bf60ae2c3893a08ce963d5bc8b52ffe0a74aec85925101fa35a4575cee3ca
Next block: 5196935e55051b4ccd5bc9e0beae63f0e4a726fed6afc2e6a39be2f75693d00b
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597899
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: 06005ad6d3fe65de05a7f678496aacacc4c7fa85041975178e404842ca45eeb2
Median time: 1701597898
Difficulty: 4.656542373906925e-10
Confirmations: 2054
Chainwork: 000000000000000000000000000000000000000000000000000000000000017e
Bits: 207fffff