In relation to the first part of this question, the information is already publicly available through the published Revised Estimates Volume for the years in question, including at subhead level. The link to the Revised Estimates Volumes are available here: www.gov.ie/en/collection/e20037-revised-estimates/ Expenditure for all of these years (except 2021) is available through the yearly audited Appropriation Accounts by the Comptroller and Auditor General; Link available here: www.audit.gov.ie/en/find-report/publications/appropriation%20accounts/
End of year expenditure for 2021 and the Appropriation Account for OPW for 2021 is still being audited and will be published the Comptroller and Auditor General later this year.