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: 623
Hash: 081c84176c513752320a4190ce5ebfcb21a2d7e4603460c1c555d0b26427a8b5
Previous block: 2bdc7c33ffc8f05d4427a09877ac9f650b93ec535a700b99a082869ae2568820
Next block: 4eb361a881ad305c933ff856b3123037e169c1aab402a349f035f5eed1dbc187
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864247
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 6fb34671fd3c3c2b25937a397a071ee89631cef41946855c97ba4a8612661bf0
Median time: 1701864246
Difficulty: 4.656542373906925e-10
Confirmations: 1621
Chainwork: 00000000000000000000000000000000000000000000000000000000000004e0
Bits: 207fffff