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Ledger Live is intended to do exactly what you’re talking about here. I think the only thing you need to do now is click Add Account and add the different accounts into Ledger Live one by one. Once they’re all added, all of their asset balances get added together into your Portfolio tab.
Maybe I’m missing something obvious in your question though, like are you asking if there’s a way to add them all without going through Add Account for each crypto?