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: 2020
Hash: 581fa6788ef6c8de716fe9cfceeedd8ebfac32c07fa2226b30e1e4992c55587e
Previous block: 50d74f8df23311ddefdda052832357d4aa4b503bed49bd783772550484748673
Next block: 2766fe7a7b0170e0167dc359caf5e8030eb2765e6a38a363aa7d946b1e11d072
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964773
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 630dbf62d37be7624985261e5b860991cec5c96c7dd7a33aab088ac3d1b2d6cd
Median time: 1728964772
Difficulty: 4.656542373906925e-10
Confirmations: 224
Chainwork: 0000000000000000000000000000000000000000000000000000000000000fca
Bits: 207fffff