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: 221
Hash: 42303c1db81a5869938759fa0b04782c663db15fec6f831dfda34db33364ab6e
Previous block: 686d8af68bff4e663f686ac21f16d2985af9acabaa7037b18ab74d18906c3e4b
Next block: 7f08fcaaf76981403625bd87f0d02fe23411e7801413ec210be7b676794a6875
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597904
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 15e905cc7dc366d0ed3639253f9875f45d783a1307c6b6c4acc29af27d5fd41e
Median time: 1701597903
Difficulty: 4.656542373906925e-10
Confirmations: 2023
Chainwork: 00000000000000000000000000000000000000000000000000000000000001bc
Bits: 207fffff