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: 505
Hash: 562e1b9323467a45620032237182c280c11f48ff344bc9d9625ae3d14a215aa9
Previous block: 0698d6fbcfea2dc95ba498437955df29365844632c2675433f378f540e6431d7
Next block: 65528b3d6b71177d477f2fc7518402fb61f27566c4834d89d18d5f03f67494ae
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864228
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: de494351f87837bf962fe34253526f9218653d0eb479951f4f9156de437a8e25
Median time: 1701864227
Difficulty: 4.656542373906925e-10
Confirmations: 1739
Chainwork: 00000000000000000000000000000000000000000000000000000000000003f4
Bits: 207fffff