Your lack of specificity indicates you have no clear goal and no defined plan. Your progress matches that: newbie gains that will hit a ceiling shortly. That’s fine, newbie gains are awesome. While enjoying those, research so you can start taking your training from “well-intentioned newbie” to “beginner”.
Getting stronger, having larger muscles, losing fat, and developing boxing-specific skills are all separate goals.
Pick a goal. Find a plan from a reputable source that is designed for that goal. Follow the plan. Make sure the plan isn’t just working out, but diet and nutrition to support it too.
Yes, especially during newbie gains phase, but not optimally and it will get progressively more difficult as goals become counterproductive to each other. E.g., you will rarely find intermediate+ folks attempting to gain muscle and lose fat at the same time. Calorie restriction for fat loss will also impede muscle growth.