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: 606
Hash: 5b8b44ba6cf6fb6a7b4f10b330be19e13e0547b799205496e6c9d6966c56ae89
Previous block: 28dc3113dd546fa7d903236508867feca115579079d4b53efc1a2ccfe0504578
Next block: 033db07ab08ec9eb7c78ed7c303d688a0804d34a7a13ba017b62e100d60ad850
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864244
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 09ebd7bcabe20857403c2907dd5f6379a5217a226edddbd03d5e2a1700051e25
Median time: 1701864244
Difficulty: 4.656542373906925e-10
Confirmations: 1638
Chainwork: 00000000000000000000000000000000000000000000000000000000000004be
Bits: 207fffff