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: 676
Hash: 0085e43cd630149ed3092261182005e6d56e24da47edf4ee1e4405c3c20049ea
Previous block: 7e0a46ea552a09f4a95f5c0e4f6a8b058b075e5960b5fdbb0a3ec9b829c3dafa
Next block: 6171f36e85d6092bef215dd143c2fe3db4388a7935508a7aa2719a7567d07c86
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864256
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 6fac6d81997dad53ddc63901c28d1a52fd37ef11874889062ad32dfe1f7282ad
Median time: 1701864255
Difficulty: 4.656542373906925e-10
Confirmations: 1568
Chainwork: 000000000000000000000000000000000000000000000000000000000000054a
Bits: 207fffff