I wouldn’t say ‘significant’ because it’s hard to put on that much muscle in a deficit, but I’ve certainly been able to add some while losing a fair amount of weight.
Mostly just keep working out, get your daily protein goal in, and don’t exceed 1% body weight a week is the best environment to maintain or possibly add some muscle.
I’m 52 years old and have lifted off and on for most of my adult life . Mostly power lifting but also body building and occasionally would slim down due to running. Unfortunately, there is no way (other than steroids) to gain muscle AND lose fat at the same time. Keep working out to maintain the muscle you already have while your doing IF until you get you body fat down and then build muscle . It’s like a cycle. Good luck
I think it’s a cycle do some solid fasting with clean eating and there’s the majority of your consistent “slow & steady” lifestyle weightless …
add to that long walks while fasting or exercising almost daily or lifting, and that will get you where you need to go, if you are fasting you’re losing over time, if you are working out then you are maintaining