Thanks, i don't want to use my phone number, it's not very secure. and for KeepassXC, i need to keep the KDBX somewhere, in the worst scenario, what if i lost

Thanks, i don't want to use my phone number, it's not very secure. and for KeepassXC, i need to keep the KDBX somewhere, in the worst scenario, what if i lost the KDBX? (my laptop is stolen, broken etc.)