True Keto is very high fat (like >70 grams), moderate carb (30-45 grams) and very low carb (<20) a day. I am 4 years out and have been Keto for a while. My surgeon and docs are all for it, I used this to conquer some regain and also to resolve a health issue.
It is quite different from a 'bariatric' diet. I don't drink milk or eat yogurt anymore, I follow the rules of keto, I eat my macros calculated out for me. They change as my weight goes down. I also incorporate Intermittent Fasting which also has made a huge difference. I will probably eat this way forever. There are tons of resources out there, especially on youtube and there are substitutes for EVERYTHING, but I try to stick to a very basic food list.