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: 871
Hash: 4f3c17cfa718a82c4db32424bae47c544df7fb12ba2a0e7fc51ba9be782077c9
Previous block: 4f0d1105033c2722816290e225c00caa81fe6af55508bc4cbb2c25540977095e
Next block: 0412f75e59938c1b48758800f349b3688e1309cf0c3d2e6dbf3e63348a7d446c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857814
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 28d2688793733f0a2b438ef0a8bcf6fa172c7955a57b68fc33afdfc0ee69dac0
Median time: 1707857813
Difficulty: 4.656542373906925e-10
Confirmations: 1373
Chainwork: 00000000000000000000000000000000000000000000000000000000000006d0
Bits: 207fffff