When you actually get the device manuals, the suppliers are remarkably coy about what “water-resistant” actually means and when it applies, beyond “less prone to water damage than those that are not”. So just be aware what you might mean by the term may well not be what the supplier means - and second hand items may have lost some resistance as well.
Also, if you are in rain or drizzle, you’re probably not going to be taking the best photos regardless of kit!
Kayaking sounds more like you need water-proof than water-resistant. For interest, the following is from the “water-resistant” Canon R5 MkII: