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: 2420
Hash: 532978ad259350c15499cc817e0a3439ca91caf9334137370da966d8f8f8f467
Previous block: 6168df01c00ffa81dd2ceb860475f66289ecad398cefc30851cc3c2448d1e9a8
Next block: 5776c243ed69b11be7e36ae242a21d6c234e61f3f111159401ccff5c9eb54e40
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847290
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: f8b86f64f0c9082ddd2221b7829e8e5ec05481d6f7d401887dd2c4193febaae9
Median time: 1743847289
Difficulty: 4.656542373906925e-10
Confirmations: 223
Chainwork: 00000000000000000000000000000000000000000000000000000000000012ea
Bits: 207fffff