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: 2521
Hash: 56ac914fcd01ca499806f389a3dbf4bfec924160b8e2b80fc083a1aab8337b31
Previous block: 5e9fc4cb740f330c37cb7feddde32c7f47ac70f5a7c07f68083b32b80008f122
Next block: 006445776631e73c9ac7ef48140dbb0e7fee46b9aaa646e6c1dbfe6414c5c00b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1743847307
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 28b482ed8afff5108c966d6ed9b1f6b0215a8c8339ba221c8d165e99ad3f4c5f
Median time: 1743847306
Difficulty: 4.656542373906925e-10
Confirmations: 122
Chainwork: 00000000000000000000000000000000000000000000000000000000000013b4
Bits: 207fffff