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: 628
Hash: 12f83f6427c16ea94ed2ee3f0601d4431e59a50fdc7dae25aac573db094d4a64
Previous block: 4a4ae61dfb4d36d92ff552a4e17c32a88f2860e6a93e93d292dce7ae29341021
Next block: 49f0cd3f75af296ebbc753a0b4246d0657ec576ed56fef830b4413d98d0bc82b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864248
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 1c5a1f2e3fd89b3250fb668640040a8686a173e48a4d9ed211118f752566415b
Median time: 1701864247
Difficulty: 4.656542373906925e-10
Confirmations: 1616
Chainwork: 00000000000000000000000000000000000000000000000000000000000004ea
Bits: 207fffff