Yes you can! Simply set up another account in Wallawallet with enough HBAR in it to trigger the collect rewards for your other account regularly. When you click on the Staking icon, just click on the downward-pointing chevron icon to the right of the account id to reveal a selection list of account ids and add the account id associated with your hardware wallet to that list by typing it in the text input box and clicking the plus icon to the right. Now, whenever you want to trigger staking rewards for that account, select that account from this list and collect the rewards! The only time this won’t work is if your target account is configured not to receive payments from the sender account or there is not enough HBAR in the triggering account to pay the fees.

With Hedera, you can indirectly stake HBAR to a node by staking HBAR to another account which then stakes to a node. Given that you can due this with numerous accounts (but only one level of indirection), you may be interested at some point to know how much HBAR is staked to your account that directly stakes to a node. To see this, you can use the paid query “Current Info” button on the Hedera Staking screen. This will not include the HBAR that is in your directly staked account, but will show you the amount of HBAR from all the other accounts staked to it.