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: 668
Hash: 593b176f3adaf08f4cf1d5cff21122006939a1aedabb8796c81c09ade44ab2eb
Previous block: 4c6b7b3499a3b9fb6e4d12de72ed9c23ffdcbbab261c7b069e47fd8c08a22af0
Next block: 40585abd4246161a56e846eabd5e1a1aa3b514845ed8611aa586c5fa7142df4f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864255
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 8e69dd8e4988f2798d9e4f1a5d798c11b2fd5bd1b0738db18f8e1272bc09989d
Median time: 1701864254
Difficulty: 4.656542373906925e-10
Confirmations: 1576
Chainwork: 000000000000000000000000000000000000000000000000000000000000053a
Bits: 207fffff