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: 299
Hash: 3f67ef25bbc30170741f090d530b39a9a84e7224615008de4f41e57705e6a225
Previous block: 6be8e8bacd12e3aae6d9868924e18df461bbdc397edd9fbeb53233bf2dda0212
Next block: 0637f183c74623bd7a08a60258934f23e45a16cb5ad6ddde6c37eb3df541f004
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597917
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 26567d9601c98e741cde3266c2e2f5a9a34ea9b6600018e6996d33ecd51e82f9
Median time: 1701597916
Difficulty: 4.656542373906925e-10
Confirmations: 1945
Chainwork: 0000000000000000000000000000000000000000000000000000000000000258
Bits: 207fffff