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: 819
Hash: 21f686832c8dacb7247a6044c2c39143f524e2eb2d13340fa91670c0635fad97
Previous block: 5cb21196e82ce945a8eb0cd15991971878b303dc8e46900d7082724e2de27f86
Next block: 29ccc0ba0a8110fe5c690d5694a8577227515552baa4b94d46500df73062ea19
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857805
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e68fc592fe46dea50e3f75adb63ed117a376b2717968f00ce6943c6cbd15ba2c
Median time: 1707857804
Difficulty: 4.656542373906925e-10
Confirmations: 1425
Chainwork: 0000000000000000000000000000000000000000000000000000000000000668
Bits: 207fffff