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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 666
Hash: 5a0404fc36a43e0b3b8d3d7ccb6b6e1c43a8a42eddd2ee58e94e8f3bb2711025
Previous block: 5a5fa0978761f55b8f195bb40310d17ea1af65ed5d4982512e703cf6e56104fa
Next block: 4c6b7b3499a3b9fb6e4d12de72ed9c23ffdcbbab261c7b069e47fd8c08a22af0
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864254
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 2c8af951b82d7e381aae6237db978a287fef38e6425fb8ddece7140360e2eb83
Median time: 1701864254
Difficulty: 4.656542373906925e-10
Confirmations: 1578
Chainwork: 0000000000000000000000000000000000000000000000000000000000000536
Bits: 207fffff