Plagiarism in acknowledgements? Subsequent publications rely on the exact same set of funding agencies.  In total, that is an alphabet soup containing no less than 35 acronyms.

I'm using the exact same paragraph in the acknowledgements.

Would that be (self-)plagiarism?

It does seem to fit the definition, but... it seems silly to rewrite or to add a citation...
If it is truly an ordered list of funders and grant numbers, then there is no original idea that you are plagiarising. It is like reusing a list of affiliations in the author list. If you are describing how each person/funder/agency contributed, then there might be some originality in the statements and the exact contribution potentially changed between studies.