Regarding deposit tax, see https://support.traderepublic.com/en-ie/1512-How-can-I-earn-interest-on-my-cash-balance (here).
"A capital gains tax is withheld for all customers in Germany. For international customers, no taxes are withheld on interest. It’s up to you to declare interest income in your tax return according to your local tax laws."
i.e. no deposit tax for Irish customers, but obviously the gross amount needs to be declared to the Revenue.
BTW, great to see 2.00% instant access being paid.