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: 209
Hash: 73b35ff888079c14129a61c800113fb2d67d4acacc2c7f4791ebf44ead8d8ce8
Previous block: 25aac0c655f57ccabf569772f0d6004e5b3bd009a70bb6e7a67b433c829b1c4d
Next block: 2ae9c817baff57bd598f3fd38715a30e152e44bedfa9de87c7b2a6bf7f0f6583
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597902
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: fa695e311e7cb970e5ae3be57f240fa20ee85101d08d9da861d9c492b11ad864
Median time: 1701597901
Difficulty: 4.656542373906925e-10
Confirmations: 2035
Chainwork: 00000000000000000000000000000000000000000000000000000000000001a4
Bits: 207fffff