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: 571
Hash: 1f354d82df8303fd7de60ebc66713af9d07e31a234db94799119cd40e39963b7
Previous block: 608512d3a95c01e6dfdbbfb282d4b220dfc1a9fff18ab61d5754a36de1d4b639
Next block: 0935f6d763dd166b0ca62a3c2abdd557f8bb588fbeceb5c99ee0145df10b70bf
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864239
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e665d5b470fec85a63dcfc2f2d4cc02d37823cadd28a2699c860762b39acac08
Median time: 1701864238
Difficulty: 4.656542373906925e-10
Confirmations: 1673
Chainwork: 0000000000000000000000000000000000000000000000000000000000000478
Bits: 207fffff