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: 219
Hash: 5b87959d4ee87a43eed44615f6a248f262a713489b91934af5be992aaf3a2784
Previous block: 1a695856d4b63b8614c7e50a7c6ebcbc25c228385a2269aacb4b69f58e69caba
Next block: 686d8af68bff4e663f686ac21f16d2985af9acabaa7037b18ab74d18906c3e4b
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597904
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: 4a6c2c28263008e7741537306456dc9db10c8ec1f0cc9d26e3732acd4cad87c3
Median time: 1701597903
Difficulty: 4.656542373906925e-10
Confirmations: 2025
Chainwork: 00000000000000000000000000000000000000000000000000000000000001b8
Bits: 207fffff