I'm not sure how many climate scientists there are specifically, but scientists will see impacts even if they're not studying climate change specifically. Biologists are noticing changes, eg. trees flowering earlier than normal [1], coral bleaching [2], record low moisture content [3], etc. Even psychologists are involved [4]. It's pretty hard to escape.

[1] https://www.abc.net.au/news/2021-03-31/japans-cherry-blossom...

[2] https://en.wikipedia.org/wiki/Coral_bleaching#Pacific_Ocean

[3] https://www.sfgate.com/bayarea/article/fuel-moisture-content...

[4] https://www.apa.org/science/about/publications/climate-chang...