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: 424
Hash: 33f86a0e584dc77d70b3d61e9ab9b13475c59d7ac590bd9967113108a1a96251
Previous block: 590bae148bc9257ffde280568e180206f5117ed96803ca41b9ea5f72d299acbc
Next block: 2970e20a6b1938b7a7d787a68ee7451b164de8e17d6254feaf62c3231ba4c241
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701864214
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 60500e94adc34cc016135081950573725ae605abe4ba4c1e99d6e36a537e4bba
Median time: 1701864213
Difficulty: 4.656542373906925e-10
Confirmations: 1820
Chainwork: 0000000000000000000000000000000000000000000000000000000000000352
Bits: 207fffff