I have a couple of these. Kinda pricey and I'm sure there are cheaper that can do the job but I like being able to turn them both on and off with my phone. And the dimmer works from 1-100% power. https://www.amazon.com/gp/product/B086V3S2Q7/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
The only US Zigbee dimmer plugs I've seen have been the GE and similar Enbrighten options.
Kasa does have a WiFi option that is actually rated for outdoor use. Treatlife makes single and dual receptacle outdoor WiFi versions as well.
It does sound kind of hot. I love this dimmer. https://www.amazon.com/gp/product/B086V3S2Q7/ref=ox_sc_saved_image_2?smid=A3U2GPXV9J2W2G&psc=1