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: 739
Hash: 3531a30c8cc000bde7503cfde410cdd8e038871989b4a405b1244f95b1008bd5
Previous block: 172fc50fb2ec2d9c3d3213dc1d6a532da2bf73c24cdad3bfb540fabcfc7da644
Next block: 7074ae2406b789133b06cbaca107222d1bb9108e9987f4bb2930c4827834b2d4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864267
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 968a7dd6c60e7e700171b07e32263f70490a9606e9121eecace1a629f85e4a26
Median time: 1701864266
Difficulty: 4.656542373906925e-10
Confirmations: 1505
Chainwork: 00000000000000000000000000000000000000000000000000000000000005c8
Bits: 207fffff