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: 312
Hash: 55099cfe1e4d31b5593bdba6f5d50e646d2350a1d72a154e10c297cc0cc7672a
Previous block: 0019ac60d5b321738ef27a5c4917b081ca1fcdb42077a7b713cded54e25d0e04
Next block: 1692cfb36dec018a24e7b7c3a935d976057612e751fd6b7248380d3c052ef6f4
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597919
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: c5a837330f29136549b6bd23e4b73db2cbde470e2faebe20428d76090e602241
Median time: 1701597918
Difficulty: 4.656542373906925e-10
Confirmations: 1932
Chainwork: 0000000000000000000000000000000000000000000000000000000000000272
Bits: 207fffff