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: 4
Hash: 6c084c3c35b2e6b246852aa2a91a5a98fe333fe247f52970ad5177ff7aa1d28e
Previous block: 7083a6f9565b75cd36e0c8333bd1ddcde8cf6bf15dfb841fe3107ab452ebc791
Next block: 180e81b81478b233ee9d7363d95889a24856d8572995e37d1b3f8f154fad381d
Weight: 864
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597868
Stripped size: 216
Size: 216
Nonce: 1
Merkle root: 6a2cf508f1aaec7c6da43b92b2949c6c25cda06cb6c3d798b10c927189457c2d
Median time: 1701597867
Difficulty: 4.656542373906925e-10
Confirmations: 2240
Chainwork: 000000000000000000000000000000000000000000000000000000000000000a
Bits: 207fffff