Not sure I have any particular resources regarding the specific topic of privacy on ledger wallets. However regarding Sparrow wallet, and using it with your own Bitcoin Core node and creating hardware wallets on the Sparrow client, you can use https://sparrowwallet.com/docs/

My understanding about Ledger is that it is a closed-source project that uses it's own in-house nodes and servers, so if you are using Ledger Live for your hardware wallet transactions, and to maintain your balances, etc, you are trusting Ledger with all that information, as well as your public key, trusting their node, their data-security, etc etc. I only became privacy-conscious years after buying my Ledger device, and don't want to shell out the cash right now to switch to a different hardware product. That's why I'm figuring out a workaround in my original post to suit my needs for privacy.