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: 343
Hash: 6ce95c432a9aded74bfdc76502d8424f63a51bc09b35e4a4d9111e80f8e1afa4
Previous block: 7509b7e31454a6e8596b0b0464380cac557fc0b701faba4db7e30b6369027e1e
Next block: 42f91f6412dc02cce6a550474a324940345acdac60942eb32f889b529d203e5e
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597924
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 2c9e5517675beff69ad16d3d9e2cd9946641dd2d1fb33405a42c25d1024e4571
Median time: 1701597924
Difficulty: 4.656542373906925e-10
Confirmations: 1901
Chainwork: 00000000000000000000000000000000000000000000000000000000000002b0
Bits: 207fffff