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: 1564
Hash: 5ba6b3e123fb6d0ccbc71ca208be61cb9f75137b02cc74ea4208d66845e7f515
Previous block: 081d1804938c8e9b6ce620b486bd65986e0d50e05043ed6e09ba1eae2be9184e
Next block: 024e669159c046df23a35a69d50711989dca08a5930dade4168508b2640afcbe
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697668
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 378df65b0be8dbca6fda3ce659f48ee752d463e76710948066f4274ad4bb3dcb
Median time: 1718697667
Difficulty: 4.656542373906925e-10
Confirmations: 680
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c3a
Bits: 207fffff