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: 665
Hash: 5a5fa0978761f55b8f195bb40310d17ea1af65ed5d4982512e703cf6e56104fa
Previous block: 256269e408add1287a76606f7bf9fff65dd71ef3c162d679e4d16b88a0a5fcc7
Next block: 5a0404fc36a43e0b3b8d3d7ccb6b6e1c43a8a42eddd2ee58e94e8f3bb2711025
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864254
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 915091e1e917a37e840a008c634b2281bdc66c875ad042893bf1ee9936006d6d
Median time: 1701864253
Difficulty: 4.656542373906925e-10
Confirmations: 1579
Chainwork: 0000000000000000000000000000000000000000000000000000000000000534
Bits: 207fffff