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: 1490
Hash: 00f008bbd4b884054a1b4832a3f388456d691a4a0f3b1c5273e4141fd5a226c3
Previous block: 2226df4336e5e6c114221ca84a1d2e247a2fce9437696e599e7adeab88a8f0fa
Next block: 04c0f08cc46a4dfcd2635b252c4975f2f5870a9580c3429014a5537c5cc5a08c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697656
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 70ef7faaeeef2c3c1f23d181c6c21a41142022474b28b2e1b00ad828a21faa35
Median time: 1718697655
Difficulty: 4.656542373906925e-10
Confirmations: 754
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ba6
Bits: 207fffff