Only 8 of around 40 DPAs that were involved in the process disagreed with the Irish DPC's conclusion according to TFA, so I don't think it's fully fair to lay the blame solely on Ireland here.
b. The Hungarian SA raised an objection on 21 January 2021;
c. The Dutch SA raised an objection on 21 January 2021;
d. The Polish SA raised an objection on 22 January 2021;
e. The French SA raised an objection on 22 January 2021;
f. The Italian SA raised an objection on 22 January 2021;
g. The Baden-Wurttemberg SA raised an objection on 22 January 2021; and
h. The Portuguese SA raised an objection on 22 January 2021