Decided to test this to see if it worked for me. The Anova skill was enabled in the Alexa app but I had to "re-link" with my Anova account.
me: Alexa, ask Anova to start cooking
Alexa: what temperature would you want to cook at?
me: 140 degrees F
Alexa: I told Anova to start cooking at 140 f. How long would you like to cook for?
me: 15 minutes
Alexa: I told Anova to start cooking at 140 F for 15 minutes.
Just got the notification from the app that timer has started.
FYI I had to do a reset on my android phone 2 days ago so the Anova and Alexa apps were just loaded to my phone.
update, every command I tried work until I ask to stop cooking, got the 404 error but the APC did stop.