Blockchain explorer BTC wallet address balance showing zero

Blockchain explorer BTC wallet address balance showing zero
apfleisc
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Sorry if this is a dumb question, but I put my BTC Ledger wallet address into my mempool app on Umbrel for Bitcoin and it shows a balance of zero. I did the same thing on blockchain.com and it also showed zero. I'm looking at my actual wallet now and there's definitely not a zero balance in the wallet. Why would the explorer show a zero balance? What am I doing wrong?

edit: scammers don't even try to slide into my dm's