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: 5
Hash: 180e81b81478b233ee9d7363d95889a24856d8572995e37d1b3f8f154fad381d
Previous block: 6c084c3c35b2e6b246852aa2a91a5a98fe333fe247f52970ad5177ff7aa1d28e
Next block: 1438a652ec91940086a71057fe517b6040b97535d96556231f27d69b30ef74ae
Weight: 864
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597868
Stripped size: 216
Size: 216
Nonce: 2
Merkle root: 92e1e476a0b0a3f80110ee5a656efdf2883019ce7ee33ef94dc9ea302f7601a3
Median time: 1701597867
Difficulty: 4.656542373906925e-10
Confirmations: 2239
Chainwork: 000000000000000000000000000000000000000000000000000000000000000c
Bits: 207fffff