Hi 👋 Bram
What is actually that you would want to automate? A fair amount of companies already give you a choice about which day you would prefer the direct debit to come in. Besides, bunq has no control over when the companies send the direct debit and collect their money. bunq actually already uses the maximum period of 5 days to allow you to manually accept the debit or when there are insufficient funds to still be able to add funds and retry the payment.
Another way is to budget one month in advance (at least for direct debits), so there's always enough money in the accounts. That what I'm doing myself so direct debits can always go through.