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: 274
Hash: 76387b9afba97370f5fdd10611cdb9fe9e925fff9c3bf7653445cc0507c6eb0c
Previous block: 55751aea8b1a86d32f185e548ff5e1856cbebf134d4b83754d8fec286ad58600
Next block: 017b981370170dcb396a0563284748d4621e8dd6f3eea4dced77c0b8d16d25b5
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597913
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: a13809c042b8321a38d3e7213f84ae1b2861b25a12e7b960e878a785d638adfc
Median time: 1701597912
Difficulty: 4.656542373906925e-10
Confirmations: 1970
Chainwork: 0000000000000000000000000000000000000000000000000000000000000226
Bits: 207fffff