Amir-Magenta-Quokka There aren't any sub accounts, each one is their own independent account.
Theoretically the answer is yes, but unless you're capable of using the bunq API to create this yourself the answer is no.
There are some apps/programs that use the API to access bunq, but as far as I know they don't allow access to only 1 account. So if you use those they will get to see all accounts.
Of course the "normal" way to do this is to connect people to one account but that only works if the others are bunq users too. They can be on the free subscription. This does give them the opportunity to spend the money as well, though! Only if you're a Business you can connect people with only read access.