There seems to be a bug in Athena / Glue related to partitions that contain whitespace.

In my original table, I have a paths that look like this:

bucket/prefix/partA=123/partB=2025-01-01 00:00:00/partC=xyz/parquetfiles

if I re-create the table so that the paths look like this:

bucket/prefix/partA=123/partB=2025-01-01/partC=xyz/parquetfiles

Everything works as expected.