A bit confused as to what exactly you want.
One one hand, you seem to want easy access and don't care about rates.
On the other hand, you don't seem to want to use your easy access N26 online account for savings and seem happy with a term deposit.
What type of account exactly do you want?
The highest regular saver rate is 2.50% AER with the KBC Extra Regular Saver product provided you open KBC Extra Current Account also and you deposit at least 2,500 EUR per month into the account to avoid fees. A lump sum of 10k is allowed and monthly payments up to 1k subject to a 40k rate cap.