To create an account group on your iOS device, please proceed as follows:
'Settings' > 'Account Grouping' > 'New Group'
Alternatively, you can create a new account group directly from the account list:
'Accounts' > 'tap and hold on an account' > 'New Group'
You can now enter a name for the new group and add accounts to it.
Banks that show a small folder symbol in the Group Management already belong to another group. If you assign them to a new group, they will be removed from the previous group.