I also went paleo/keto about 10 years back, I was really fat. Went from 120kg to 89kg as a target.
I also tried full carnivore for two months but with no additional bennefits for me.
Still have belly fat tho :/
Now I started doing longer fastings around 3 days.
I'm not a big sports enthusiast but I am walking and occasionally exercise with a kettlebell.