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: 373
Hash: 20100a53a77941d9a14b2fa5fcb5a8bec3cf095251836cc4d0c546a21667cb46
Previous block: 462f54d47accd1eaab4cf4d4c2ccedbd9a765668701bb184df2c58e6bb8b8644
Next block: 31d053e94ac8093aa3bb595046783780f2f099b1f20632c4e48e189c09c2af91
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597929
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: fa44cdb5e657254f0b30881deaaf1fadec2e8a48090c9becf077fbc86680005a
Median time: 1701597929
Difficulty: 4.656542373906925e-10
Confirmations: 1871
Chainwork: 00000000000000000000000000000000000000000000000000000000000002ec
Bits: 207fffff