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: 518
Hash: 151bd3880be8fd859e4cda96ed7a4d9841a3f1b4929eb479446ff6d5d81fb787
Previous block: 18b5440cfcca8a6b25d4b7143406b6c70e9c0ce07c2cf589adbda80e0f33fa2d
Next block: 01c9ccfc5e32b8aca26369d5a71093990158f5da0960802824eb492c17563457
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864230
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 548f6b181df4fe3dae2a6e7789c0e52e6c584c99fc99f61e8bf661dfc39b2cd2
Median time: 1701864229
Difficulty: 4.656542373906925e-10
Confirmations: 1726
Chainwork: 000000000000000000000000000000000000000000000000000000000000040e
Bits: 207fffff