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: 1938
Hash: 0a5b35a532b60587d3da2d600969807d838e79d5fe24221ec520f445ad799c83
Previous block: 35fdcbd94f0a1d0c86407a25bb6a500f2a659120e39919aacb98ae872947d8bb
Next block: 5cda7e3bab56d7de10e173db8d2d735457666732c920f12f19f8279802fc0136
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159246
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 54daad56e4ac655757aecd2de29f8b21968ed16654e777407596f8c72222b7d2
Median time: 1719159245
Difficulty: 4.656542373906925e-10
Confirmations: 306
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f26
Bits: 207fffff