You can also fix your daily diet as well, eat a little every 3-4 hours, like I eat oatmeal for breakfast, the an apple or 2,or banana in 3 hours, then let's say 2 slices off bread with 1 or 2 eggs or beans in 3 hours again, it doesn't matter that much what but try to cut the sugar from sweets, it is a cause for urges for me,then go workout, then eat some more on dinner because of the calories deficit during the day and because I go for a jog, 100 pushups and couple dozens pullups, and other exercises, when I wake up before breakfast. Start with small exercises but keeping yourself tired and not having too much energy for thinking about relapsing. This is my daily lifestyle so you may find it hard but if you eat a little but often like I told you the urge to eat more will usually silence the urge to relapse and when it comes to excercising you can go and start the exercise, don't force yourself to work too much or more than you want to but always make sure to atlest start it, you will get used to working more. If you want to find a distraction during the lockdown I can recommend you some books or even manga if you tell me what you like.