If you used the Offline Accounts in OutBank DE, all these accounts will also be available in the new Outbank app.
It is possible, the the amounts in the apps do not match. The reason: your Offline Accounts got transfered to the new Outbank with the first migration in the background and thatfore they shwo the balance from that time.
If you used the Offline Accounts in OutBank DE since that and you want to transfer the actual data, you have to migrate the Offline Accounts again as follows:
Settings > Cash Accounts from OutBank DE
If you migrate the OutBank DE cash accounts, all existing cash accounts in the new Outbank will be deleted only the offline accounts from OutBank DE will be transfered.