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: 655
Hash: 18aa482b399bc71f01745559272db7caa1d19683b2dfc55d9aa85e4405809253
Previous block: 460076e398401c37d1ba34e21fd64e39b5ad5ec3e03a17164d16ac76eb903bb6
Next block: 3757497a7f16cbf4a843f4a76e39c21100f4d567ef0375523f13377b179d7b50
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864253
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 91527b723bc33ce4972d38b8cd6fd3fbb5c58eb0029d3b1e135a5c7476fb5318
Median time: 1701864252
Difficulty: 4.656542373906925e-10
Confirmations: 1589
Chainwork: 0000000000000000000000000000000000000000000000000000000000000520
Bits: 207fffff