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: 2596
Hash: 3497ea4b2a17ebc18b3494db4a1051cd4bb67d20a8ab115f2834fd0986b7dbe7
Previous block: 425952f190ab5be467821dce8a28158c1ae14aa12a5f9c9a0e8351832456a1ed
Next block: 06786ac1cf63f5a85c7bf3bd427d56df7efee0e4d66232345e2719a5cdb57a48
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847319
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 26bfc83c0ab75f6fe8637ccb238d8799cf4f602fc2e55ebdd66b6d5298ba28c0
Median time: 1743847318
Difficulty: 4.656542373906925e-10
Confirmations: 47
Chainwork: 000000000000000000000000000000000000000000000000000000000000144a
Bits: 207fffff