There is a whole subforum dedicated to someone your size: https://www.bikeforums.net/clydesdal...-200-lb-91-kg/

I'll bring up the usual discussion of recumbents. The seat on a recumbent trike does not put pressure on the same areas you are having trouble with. The biggest problem is cost. You can find used recumbent trikes but not cheaply. There is a Sun trike in my area on CL for $650. It would support your weight. I'm a good example that you can lose weight using cycling as part of the solution. I lost 36 pounds since early March simply by counting calories (eating fewer of them) and using cycling as my main exercise. I didn't start out in the clydesdale category, just overweight for my size so it was really easy for me. I used a formula that calculates your daily caloric needs based upon weight, level of exercise, height, and age. That gives a starting point to know how much to eat to just maintain your current weight and then shave some off that. This way I didn't have to force my body into an abnormal metabolic state (like ketosis) but could eat most of the things I always liked to eat. I did increase the quantity of lower calorie fruits and vegetables but otherwise did not change anything. No longer eat anything between meals though and never was a fan of fast foods.