Electrum servers, lightning nodes, and bitcoin nodes are all common servers that wallets and exchanges interact with. Lightning explorers are already very common (e.g. https://mempool.space/lightning), and this electrum server explorer already exists: https://1209k.com/bitcoin-eye/ele.php?chain=btc

But it isn't very pretty, and I'm not aware of anything similar for exploring bitcoin nodes and their features. Someone should make one that is beautiful and fun!