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: 624
Hash: 4eb361a881ad305c933ff856b3123037e169c1aab402a349f035f5eed1dbc187
Previous block: 081c84176c513752320a4190ce5ebfcb21a2d7e4603460c1c555d0b26427a8b5
Next block: 6738d6f556eba8d4ff007dd7500664f8185f0b0a77d90099fd1b81c72fe64e44
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864247
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: e9e39c4f7d4f3ecd765275e5f31c9655bf056381c031abb2e3970b241e5cf591
Median time: 1701864247
Difficulty: 4.656542373906925e-10
Confirmations: 1620
Chainwork: 00000000000000000000000000000000000000000000000000000000000004e2
Bits: 207fffff