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: 522
Hash: 17ca3309159860ea546d2a91ebda640988280dda5c4f92fce1317dde08a55f88
Previous block: 70aa714251a394ca7599223e605416749a6484c41e8b84a5a86fa6dc83b5375e
Next block: 17868de718d895d413d40124f5705ab7d9cee2e66dad85b0cf7d95a1ce3cf6b3
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864230
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: af6e49fa8f2c44dbec249d09bca35d9563c39336ff9333a3d1beb61962cb0559
Median time: 1701864230
Difficulty: 4.656542373906925e-10
Confirmations: 1722
Chainwork: 0000000000000000000000000000000000000000000000000000000000000416
Bits: 207fffff