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: 272
Hash: 7773cc12d979740e4e997c27638f92a075102af27e434ca4a520af3d194aa3f9
Previous block: 5ab86d2742af678fe80567c70ad7737a066cc7d05516e844574886b8aaee0c11
Next block: 55751aea8b1a86d32f185e548ff5e1856cbebf134d4b83754d8fec286ad58600
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597913
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 4fd91554a61cd33cba37eb3e6d4baedd02b86e970ce7bf61b22a98ff7d64cd6e
Median time: 1701597912
Difficulty: 4.656542373906925e-10
Confirmations: 1972
Chainwork: 0000000000000000000000000000000000000000000000000000000000000222
Bits: 207fffff