If you’re having it only during your eating window, it’s PROBABLY okay especially if it helps satisfy your desire for sweet. It’s my understanding anything sweet can trigger an insulin (and hunger) response – sugar, stevia, aspartame – you’ll have to test it on yourself as it differs from person to person. I’ll have a Zevia after dinner sometime and, for me, it’s benign.
you’ll have to try and see. some people it’ll cause an insulin spike and increase hunger. I used to drink diet coke/pepsi all the time but had to cut it out when I first started fasting/low/no carb and when I had one recently I almost spit it out as it tasted like nothing but chemicals :(