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: 1900
Hash: 142dc3bb052b172e4abe438164c60751edda1e2f266ca3db78effd1eafcbfe3d
Previous block: 338fae7cbc8cacebc06d05cb4f1a58d863b4f735c4656cd965039b9948adf6e9
Next block: 557e71c963354c0a4defa2f50f1869b97fb9b1976df27e370d6b75992c22cbd6
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159240
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 948cf2f3e36e17a3feb95436047b2b557e40c192f0ad8e9abc75c6f438e95482
Median time: 1719159239
Difficulty: 4.656542373906925e-10
Confirmations: 344
Chainwork: 0000000000000000000000000000000000000000000000000000000000000eda
Bits: 207fffff