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.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 657
Hash: 397552b636f3636f529a7d55919e3f5134be98e2b03af4db4099b6065c32f14f
Previous block: 3757497a7f16cbf4a843f4a76e39c21100f4d567ef0375523f13377b179d7b50
Next block: 7835f40bc2f93ea9e0579798b5b70025db1c9ac070660bd99891acc364e848c3
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864253
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: a5767a38bf1c8e2b55e2f532b7936244f199b302cf5f78394ec02d71922a4ceb
Median time: 1701864252
Difficulty: 4.656542373906925e-10
Confirmations: 1587
Chainwork: 0000000000000000000000000000000000000000000000000000000000000524
Bits: 207fffff