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: 618
Hash: 66305e969a9bcd2ff39ed55c0bbac296717a0008847e2f094de5da8e5f8020ca
Previous block: 05e8f2ef32eb96ea25926a8a4015564415d01afe5b7cb5ccbe4fc77de7e831d1
Next block: 3c930c98ea0acf3bc2ddf6b659d24328625e66a1c5e169583fdd84077bfdf0b4
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864246
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: df0d4ca1ab5063d839f2a304189efe88a8d857ad28eaf447da72cb405910829a
Median time: 1701864246
Difficulty: 4.656542373906925e-10
Confirmations: 1626
Chainwork: 00000000000000000000000000000000000000000000000000000000000004d6
Bits: 207fffff