I have an important canonicalization issue on my site due to the way GeneratePress archive pages treat the NEXT and PREV REL links in the Query Loop block. See the description below from Screaming Frog.
Description
URLs that have an error in the rel=”next” and rel=”prev” HTML link elements sequence. This check ensures that URLs contained within rel=”next” and rel=”prev” HTML link elements reciprocate and confirm their relationship in the series.
The Query Loop isn’t able to use the standard /page/2 structure, as it’s reserved for the default theme loop.
You’ll see that the core Query Loop block does the same thing.
Since the canonical URL exists, I’m assuming this a core archive page? If so, you can use the “Inherit query” option which will then use the standard pagination structure.