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: 389
Hash: 6a7298cafb2655272d48b48d3f044881cb0c68df7c9f1e1ad90492a37fbc135d
Previous block: 7a814c16dcd85f7cee97ae09e02bdf2657b172b3782381b5172d5c5d125c29c2
Next block: 6f099b5c5d74c1ab9c19b552d0fc35bb88ba36a3863bcbf8b91004fcf6d1eae0
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597932
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 5b282994c9d312a9f6bc9e0eae28eb23a4cc657b23eecb97978fad26aa1f18db
Median time: 1701597931
Difficulty: 4.656542373906925e-10
Confirmations: 1855
Chainwork: 000000000000000000000000000000000000000000000000000000000000030c
Bits: 207fffff