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: 554
Hash: 50289ca31fa4eba4e8552bcb8b18f4671d293588f9ee13028669e56263ba4f4b
Previous block: 5276a0afdfb0114e61bd5ff471953107580eb26082a78bb7e1068f45dcffe77d
Next block: 1b3d3b6eeb104f66675b550c7e5438ec3ebe9b7db664b670706820ecd05c011a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864236
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: ca4f1a17c9351ee5c709337702de87b62019c80407b3d9abbf5c4ebac667ba63
Median time: 1701864235
Difficulty: 4.656542373906925e-10
Confirmations: 1690
Chainwork: 0000000000000000000000000000000000000000000000000000000000000456
Bits: 207fffff