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: 123
Hash: 2904fa41623e60de07b87030505f0fe5bd2c9f10df760eaee98ad8bb5d3d389a
Previous block: 6c8d8815ef04397b6ac79b72255b58fd65e41765887af3b7674705d86f1ffc73
Next block: 093af6bfc42028796e36b4602f01862c8d1b9346a5e0d66d554297400fd562af
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597888
Stripped size: 217
Size: 217
Nonce: 1
Merkle root: ce06c5ae6a2e7ebe6279d7b2fe4181c9d3056c990403d60b9365c85554453e62
Median time: 1701597887
Difficulty: 4.656542373906925e-10
Confirmations: 2121
Chainwork: 00000000000000000000000000000000000000000000000000000000000000f8
Bits: 207fffff