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: 233
Hash: 42c094760e9331d3f865c6b91b7b476404e0e604d7f8c5587ed9362dd585b8d1
Previous block: 44f4b50f99a20506c14771ceb3fb2844aa5a3b94ad95487a22d8dcd68fafa91b
Next block: 3beb8d7cd471e64e05bef3b7afe17af0e6c1b1252523401a6fdaa1fea8797331
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597906
Stripped size: 218
Size: 218
Nonce: 3
Merkle root: c0e8ee274e74c50294396cfdd3665e278eaba7eef88158365ef0855701da0b24
Median time: 1701597905
Difficulty: 4.656542373906925e-10
Confirmations: 2011
Chainwork: 00000000000000000000000000000000000000000000000000000000000001d4
Bits: 207fffff