You ask about hold (cold) wallets or hot (spending) wallets?

Here is an exampke of cold (hold) wallet that never touch internet

The cold wallets do not have to be connected to internet. You just use their xpub to deposit only as described here:

https://darth-coin.github.io/wallets/deposit-only-btc-wallets-en.html

And here you have 2 examples of spending (hot) wallets using LN, self custody nodes:

• https://darth-coin.github.io/wallets/getting-started-blixt-wallet-en.html
• https://darth-coin.github.io/wallets/getting-started-zeus-wallet-en.html