As you can probably tell from all the semantics maintaining or the “illusion” or some shit isn’t as simple as it seems.
Your body is in a constant state of change and turn over and accounting for all the variables and replicating them everyday is impossible given there’s many variables you can’t control. In reality you’ll have to make adjustments to training and diet to maintain.
However maintenance volume and maintenance calories are landmarks that will be useful for you.
If you look up Renaissance Periodization’s “Hypertrophy Training Guide Central Hub” there is an approximate maintenance volume for each muscle group to work with. For more on the concept of maintenance volume google “Training Volume Landmarks for Muscle Growth”.
Calories wise its hard to constantly be at a real maintenance level so you’ll need to keep track and maybe like you suggested do a small cut every now and then.