Money market ETF or “overnight money” from Trade Republic

Hi, I want to get the money I saved, which is supposed to be used as equity for building/buying a house, from my savings bank daily money account because I only get 0.65% interest there. The plan is to either store it as “cash” at TR or simply invest in a money market ETF. Since I want to get the money “quickly” when in doubt, a fixed-term deposit account is currently not an alternative for me. I know that there are daily money accounts that pay more than 2.25% interest, but I already have an account