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: 720
Hash: 76f553c97ecfa434734ab2396760336b66b6ed37664ce2f5e28446a0c0912af9
Previous block: 096b87881fa21c782fd115655610ac2c9cf9733c0dacde7891b854b5a2e3af3d
Next block: 0f95ede96426fe1357aa565ba3af9b7094ba875dc853e7198a37514906ce429b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864263
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: f49ccc3b7e42bfb0112a36400ecb33a1f6e841c8d4a916d3ba8a0f54c72b5254
Median time: 1701864263
Difficulty: 4.656542373906925e-10
Confirmations: 1524
Chainwork: 00000000000000000000000000000000000000000000000000000000000005a2
Bits: 207fffff