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: 277
Hash: 07a9f133ec3bd235852c9594e59a97cd0b31495714f49809aa409976e7958b9e
Previous block: 40c8034bab85e0f5e955adbd67fa4fc976d699d8961205633d6e9fd282f29a6f
Next block: 70c577cff534accc37d7362e12ee7e3abe1d02fc1bb2b920d020c406155199d3
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597913
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: b64c0b51fcfe67769d03e110e60cb7a44f8f1990d54cc7c0a3284a8f17a73195
Median time: 1701597913
Difficulty: 4.656542373906925e-10
Confirmations: 1967
Chainwork: 000000000000000000000000000000000000000000000000000000000000022c
Bits: 207fffff