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: 553
Hash: 5276a0afdfb0114e61bd5ff471953107580eb26082a78bb7e1068f45dcffe77d
Previous block: 46cab00c0abfa1c76dda82ccaf05d93be27f870dee23eae73ed338ee521e80d6
Next block: 50289ca31fa4eba4e8552bcb8b18f4671d293588f9ee13028669e56263ba4f4b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864236
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: cc8dc9aaa6fdedf2bdd6a6490513803495754fb983b846ff54b9cb0b901686c7
Median time: 1701864235
Difficulty: 4.656542373906925e-10
Confirmations: 1691
Chainwork: 0000000000000000000000000000000000000000000000000000000000000454
Bits: 207fffff