The information the Deputy is seeking is not held by the Department. The Higher Education Authority (HEA) collates data in relation international students studying in public higher education institutions in Ireland each year, and this information is available on the statistics page of their website
https://hea.ie/statistics/data-for-download-and-visualisations/enrolments/ (under 'International Enrolments').
Please note that figures for the 2019/2020 and 2020/2021 academic year are not yet published on the HEA website.