You can definitely lose weight without exercise, but it will be harder and more likely unhealthy. Even just doing a 10 minute workout in your bathroom before your shower, or walking or riding a bike instead of other types of transport where you can, you can definitely find small ways to be more active without wearing yourself out. When I started riding a bike because I couldn’t afford public transport a few years ago I felt so much more healthier and lost a healthy amount of weight for it too!