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: 556
Hash: 77522ab2afaba58eac1f96330ad8f65e44583960182d1f8465b7bc9a1838d3b3
Previous block: 1b3d3b6eeb104f66675b550c7e5438ec3ebe9b7db664b670706820ecd05c011a
Next block: 0d999c907e30f5b402f9a4a0c3ee14c5ae6bc345445c2c4606f819b13542161f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864236
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 2dfebeb5494aea0af1eee3c2edc00c3b2273e67b4b5a1eae758e48fcb3a218b1
Median time: 1701864235
Difficulty: 4.656542373906925e-10
Confirmations: 1688
Chainwork: 000000000000000000000000000000000000000000000000000000000000045a
Bits: 207fffff